Emma's true motivations and interests behind her recent actions, are, in keeping with her mysterious character, still unknown.
Powers
Emma is a powerful and experienced telepath. Her telepathic powers allow her to perform several feats such as, mind to mind communication, mind reading, mind control, paralysis, possession, hypnosis, inducing pain and creating powerful blasts capable of killing a person.
She is extremely intelligent and cunning, allowing her to traverse the ranks in business, the Hellfire Club, and the X-Men, as well as acquire a great deal of wealth. Emma also has a great deal of knowledge in electronics, as she constructed and/or infiltrated various technological devices that enhance telepathic powers, such as Cerebro. Emma gained a secondary mutation during the destruction of Genosha in New X-Men #115, it was later revealed in a flashback that

Diamond Form
Cassandra Nova helped Emma manifest her Diamond Form, although this flashback could have occurred in Emma's mind only. This ability allows Emma to turn into living, mobile diamond form, granting her substantial resistance to damage, invulnerability to cold and heat, and enhancing her strength (the extent of which has not yet been clearly defined and durability.)While invulnerable to almost all physical damage in diamond form, like a real diamond Emma can still sustain damage if struck correctly (by breaking or shattering . Initially, her diamond form was described as being her skin, though later depictions confirmed that Emma's entire body turns to solid but flexible, diamond. While in her diamond form Emma is unable to use her telepathy, and is immune to all forms of telepathy. The use of her telepathy in diamond form and her supposed immunity has been problematically depicted, with her using her telepathy in some instances and also being affected by major telepathic abilities (such as Jean Grey's) . However, recent depictions have reiterated her inability to use her telepathy or her susceptibility to telepathy while in diamond form.
Emma was also stated to be a potential telekinetic. During the Onslaught Saga, Emma unintentionally levitated some utensils while facing a nightmare. Synch then used this ability to telekinetically levitate objects. After further clarifications, it was stated that this phenomenon is one of Frost's powers that potentially lies within her mutation.

Typical Emma costume
Status
Known Relatives: Winston Frost, father (deceased), Hazel Frost, mother (deceased), Cordelia Frost, sister, Adrienne Frost, sister, (deceased), Christian Frost, brother, Steven Frost, brother-in-law, (deceased); Celeste Cuckoo, Phoebe Cuckoo, Mindee, Esme Cuckoo(deceased), Sophie Cuckoo (deceased), clone daughter, thousands of unnamed clones(deceased)
Citizenship: United States
Place of Birth: Boston, Massachusetts
Marital Status: In relationship with Scott Summers (Cyclops)
Occupation: Co-Headmistress of Xavier Institute, Chairperson of the Board and Chief Executive of Frost International, Chairman of the Board of Trustees & headmistress of Massachusetts Academy, Multi-Millionaire, Heiress
Characteristics
Height: 5'10"
Weight: 144 lbs
Eyes: Blue
Alternate Realities

Earth-295 Emma
Earth-295 Age of Apocalypse
In the reality of known as the Age of Apocalypse Emma never joined the Hellfire Club or the X-Men. She was a part of the Human Higher Council despite being a mutant. Emma was lobotomized and therefore lost her psychic abilities, but this also saved her life from Apocalypse when he was purging all psychic mutants. Emma lead a strike team against Apocalypse along side with Captain Britain (who was very anti-mutant in this universe and Mariko Yashida.
Earth-1610 Ultimate Universe

Ultimate Emma Frost
Emma Frost of the Ultimate universe is a former student of Charles Xavier. Xavier and Frost had a romantic history, however they didn't make it as a couple. Frost left Xavier for mostly ideological differences as she thought his approach to the mutant/human relation was too violent. Frost is more passive towards working on the mutant/human relation then Xavier. Frost went back to Chicago and became a teacher giving mutant education seminars. The governor was very supportive of Frost's idea and helped introduce her to the White House chief of staff and eventually met the President. They came up with the New Mutants which is supposed to help educate humans about mutants while cutting ties with Xavier and not looking like they are mutant haters. During a press conference, Emma, the New Mutants, and even the President were attacked by Sentinels. Xavier and the X-Men came to help them. Xavier tried to convince Emma to come back to the school but she declined and returned to Chicago. In Chicago, she created a new program called Academy of Tomorrow. During the Ultimatum event, she is later confirmed dead by Madrox in issue #3.
Ultimate Emma Frost dresses much more conservatively than her 616 counterpart, generally in business-like attire. While she is able to turn into an organic diamond form, it is unknown if she also possesses any psychic abilities.
Earth-58163 House of M

House of M Emma
During the events of House of M, Emma is happily married to Cyclops and they have 3 kids. Emma was the first person contacted by Wolverine. Layla Miller restored the memories of Emma and Cyclops. With Emma's Psychic Abilities, Emma went around and restored the memories of all the other heroes. They would go on to gather other heroes to attack the House of M. While the heroes battle Magnus, Emma and a few other heroes begin to look for Professor Xavier. Emma discovers a grave that has Xavier's name inscribed in it. Reality would soon be returned back to normal.Sensing no brain activity coming from the grave, Emma surmises that the professor was indeed still alive and that he was not buried underneath that tomb.
Earth-27538
In this reality briefly visited by the Exiles Emma was still the White Queen of the Hellfire Club.
Legacy Planet
In the reality known as Legacy Planet Emma is a member of the Avengers.

X-Men: The End
Earth-41001 X-Men The End
Emma is shown as Mrs. Scott Summers in this reality, together they have four children, a daughter named Megan with some kind of telepathic powers, twin daughters and an infant son Alex. She is also shown to be extremely protective over her kids, and she states that she has seen her fair share of student fatalities and can't see her children die.
Earth-2122 Home World of Crusader X
Emma was enslaved by Shadow King. Then she was killed after Mastermind used her powers to boost her and attempted to corrupt Jean Grey.
Earth-889
Emma leads the X-Society along with Cyclops. Wolverine and Beast. The team investigates about certain occurrences in New Albion (which is known as California). Emma also made Cyclops confuse of his proposals so it would not cause any issues between the two of them. After a misunderstanding for being blamed for the deaths of the passengers in Hindenburg Disaster, Emma migrated to Europe and was married to Cyclops.
Earth-8545 Legacy Virus Merged with Warlock
She became a member of the Avengers and helped the Exiles in their assault in Vi-Locks.
Earth-9105 Forever Yesterday
Emma is a member of the Mutant Liberation Front.
Earth-77995 Age of Xavier
Emma Frost is a member of the Hellfire Club. She is also the wife of Iceman. As the Followers of Apocalypse started attacking them, they have stabbed Emma with the use of a knife and led to her death. Feeling much anger for her wife's death, Iceman attempted to kill those that murdered Emma but was later on killed by Pyro.

Days of Future Past Emma
Earth-811 Days of Future Past
Emma was once the White Queen of the Hellfire Club but went to India after a number of mutants were wiped out. In service of the mutant leaders, Emma sold her mental powers. Magneto and Jubilee then approached her and told her that they need help in saving Wolverine since the aforementioned hero was brainwashed by Psylocke who was the Red Queen of Hellfire Club at that time. With her powers, she was able to retrieve Wolverine's memories. She also attempted to bring back Psylocke's side to the good.
Exiles
In a reality where Warlock's techno-organic virus and the Legacy Virus have interacted, 75% percent have been converted into Vi-Locks. Emma played an important role to the team as she uses her telepathy to mentally communicate with other super humans who aims to look for the cure. With her telepathy, the Vi-Locks were unable to detect how they communicate. Emma is paraplegic and uses a wheelchair.
New Exiles
Emma uses a wheelchair in this reality. Though, this version is known as Dame Emma Frost. She was the founder of Force X and head of Department X. She was then encountered by the Exiles.
Earth-90210 Old Man Logan
Emma tricks others by using her telepathy to make herself appear young to others.Also, this ability is used by her to make her people follow her. Emma survived the attack that wiped other super beings. In this reality, she is the most powerful telepath. To assure herself that both races will survive, Emma Frost married Black Bolt. Along with her husband, they rule United States of America where mutants can live freely like other normal beings. She told her husband to save Wolverine and Hawkeye from a Savage Land T-Rex who was possessed by Venom.

End of Days
Young X-Men End Days
Emma is already old and uses the codename Diamondheart. She is one of the mutants who survived in Xaviera, a haven for mutants (which may compared to Genosha.) She lives together with another version of X-Men. She also attempts to attack Dust but was defeated by her whirlwind.
Earth-9591 Ruins
Emma is the highest priestess of the church of the Next Generation. She legally adopted the children of her followers and made them unlock their psychic abilities through a surgery.

Earth-2301
Earth-2301 Marvel Mangaverse
Emma is a member of the Hellfire Club that was lead by her father Charles Xavier. Their objective is to abduct Jean and bring her to the group. Though, the X-Men became a great hindrance. Toad then adviced the X-Men for defeating the Hellfire Club and bring her father back to the X-Men.
Earth-957 Blink Have Not Died
Along with Banshee, Emma was a mentor for the generation X. During a mission attempting to defeat a Phalanx called Harvest, Blink have tried to blink herself out of existence. Luckily for her, Banshee have stopped her from this attempt. However, Emma Frost along with her team have been blinked out of existence as they die.
Earth-9112 Phoenix Have Not Died and Rose Again
Emma was known as the White Queen. During the events as the Phoenix repowers, the X-men had encountered with Emma Frost and fought her mental powers.
Earth-94042 Phoenix Had Fallen to Wolverine
Emma was a member of the Hellfire Club known as the White Queen. As Jean Grey lost control of her powers as the Phoenix, she attacked Emma Frost and led to her death. The entire reality was also deleted along with Emma.
Earth-200525 Emma Could Read My Mind
Emma read the mind of Nick Thompson and found it offensive. She then slapped him.
Appearances in Other Media

Pryde of the X-men
Pryde of the X-Men
Emma is one of the members of The Brotherhood of Mutant Terrorists who fought the X-Men. She was known as the White Queen. Emma used her powers to fool the authorities that they are experiencing catastrophes such as being sunk the sand and other mental illusions causing them to think differently how real it is. Using her psionic spear, she have destroyed the tank where Magneto was captured and freed him. During the X-Men's attempt to retrieve the power circuit, Emma blocked them and Cyclops was the one who faced her one on one.

X-Men Animated Series
X-Men The Animated Series
Emma is a member of the Inner Circle of Hellfire Club alongside with her other fellow members who tried to use Mastermind to confuse Jean Grey and make the situation worse while Jean is under the influence of the Phoenix. She was a powerful telepath that can even alter the mind of Professor X with the aid of Cerebro. She also reappeared against some captured telepaths.

Wolverine and the X-Men
Wolverine and the X- Men
Uninvited, Emma Frost appears at the mansion's front door seeking to join the X-Men. Wolverine refuses her, but is eventually forced to accept her on to the team since she is the only telepath available and therefore the only one able to operate Cerebro. She successfully located Charles Xavier's lifeless body in the heart of Magneto's Genosha, but later attempts to locate Jean Grey were less successful. In an effort to remain on the team she informs Cyclops that “given time I could locate her, but if [Wolverine] has his way I’ll be gone tomorrow”.
Frost is intelligent and tactical, and is an extremely powerful telepath. Her first telepathic fight as an X-Man was against the Shadow King. Storm had been manipulated into believing that Africa was burning and therefore was using her mutant powers to put the fires out. However, in reality she was tearing the country apart with rain storms and tornadoes. It was Emma's telepathic powers that saved Storm's life, the whole continent of Africa, and eventually defeat the Shadow King. Later on she was able to disable Psylocke's telepathic attacks with relative ease.
Despite Wolverine's initial distrust of Frost, he has grown to accept her as a permanent member of the team. Her battle against the Shadow King and her success to mend some of Wolverine's memories of his time in Weapon X have earned his respect. However, she is extremely secretive and on one occasion lied to Wolverine about Forge's availability. She also appears to be fond of Cyclops, often watching him from afar.
Scott is still depressed for the loss of Jean Grey. Emma offered him that he can delete his memories of Jean and make him normal again. Though, her powers made a flashback on Scott's past and Jean remained in his mind. Emma have detected Jean through the Cerebra. She have then informed Scott and found her. Later, they helped her to escape from Archangel. Yet, after they have saved Jean and brought her back, all the X-Men went unconscious. It was revealed that Emma was the one responsible for it. She have brought Jean to the Hellfire Club and tried to release the Phoenix with the help of the Stepford Cuckoos. With Jean's memories unavailable, she thought that Emma is a good friend. Emma discussed Jean's condition in having the Phoenix Force and convinced her to surrender the Phoenix Force. Emma then confronted Sebastian Shaw and discovered that their mission of releasing the Phoenix within Jean was evolved and it includes killing her which Emma refuses to do. Emma betrayed the club and chose to be with the X-Men. Yet, consequences came such as the X-Men's trust not being on her side and the hellfire Club treating her as a traitor. The Hellfire Club chose to join forces against her as she betrays the club in exchange for her affection with Scott. Selene blackmailed Emma to Scott and confesses that Emma was the one responsible for the mysterious explosion in the Institute. This wiped out Scott's trust for her. After the events, Emma rejoined the X-Men.

Phoenix Form seconds away from possessing, and then destroying, Emma Frost.
Emma's rejoining the X-Men is short lived when Jean ties Emma up for kissing Scott and trying to ruin her life. Jean then chooses to let the Phoenix take over her so it can cease causing destruction, but Scott prevents that from happeneing. However, the Phoenix is still on the loose and once again attempts to gain control of Jean. However, Future X's warning gets to Wolverine, and he unties Emma and lets her go. At the oppurtune moment, Emma jumps in front of the Phoenix, enroute to Jean's body. Emma turns to her diamond form in order to contain the entity, and later destroys it when she shatters into pieces because of it's limitless power. Scott Summers and Wolverine witness this first hand, and the last of Emma Frost is shown to be apologizing to Scott, and then exploding into diamond pieces. She is presumed dead.

Generation X
Generation X TV Movie
Emma Frost was played by Finola Hughes in a made-for-TV adaptation of Generation X on FOX. Emma was a mentor for the Generation X alongside with Banshee. Together with her team, they fought a mad scientist who wants to gain psychic powers. She also handled a group of mutants called Hellions who died and let her blame herself. It caused her to be strict to the team and makes sure they are working good. Before she became a teacher, she works on a dream machine project and gained rivalry with Russel Tresh.
As Russel Tresh tortures a mutant which happened not to be registered, Emma appeared to save him. Tresh's fellow scientist had him out of the team. Yet, Emma was not satisfied for that punishment. She made a psychic attack on them and left. One night, the Cerebro have received the mutant brainwaves of Jubilee who was apprehended by the authorities during those times. Emma hurriedly woke up Banshee. She went to her location together with Banshee. They have met Jubilee's mother outside and convinced her to admit Jubilee to Xavier School for Gifted Youngsters for her own safety. Though it took long for her to be convinced, she let the two take her daughter. Safely, they were able to intrude and save Jubilee by using her psychic abilities on fooling others by letting them believe that they were part of the MRA by using a mental disguise and that they were taking Jubilee somewhere. Emma and Banshee then introduced Jubilee to Angelo and brought them to their Institute for further analysis. The two new recruits had a hard time dealing with their new classmates. Emma and Banshee have appeared to stop them. The class then started and Emma teaches about telepathy in which the two new recruits have been active. The day came when the team was granted to be outside the Institute. The team have faced a riot causing them to be imprisoned . Emma went to their location and fooled the police with her powers to have the students out. Back to the Institute, she have announced that Mondo will be expelled but as the others decided to quit if Mondo will be kicked out, Emma walked out. Banshee then confronted her and confessed that she is strict to them because she don't want the same thing to the Hellions to happen to her new students. As Skin was later stuck in a mental dimension, Jubilee told her that Skin projected himself to her and he needs help. She discovered that it was Tresh who was responsible for it. Her connection with the aforementioned scientist was revealed. She used her powers to open a mental gate that would serve as a portal to the dimension Skin is in. With the team finding it hard to defeat Tresh, Emma was telepathically contacted by Skin and told her to come in. Emma then said that she will die with Tresh just to defeat him but Skin wrapped him and fell. He was then presumed dead but was able to survive. After the defeat of Tresh, the team became normal again.

X-Men Origins: Wolverine
X-Men Origins: Wolverine
Emma Frost is played by Tahyna Tozzi. Emma Frost is present in Wolverine's past as she is a mutant with the powers of telepathy and the ability to turn her body in diamond form. She is sister of Silver Fox and was aprisoner of Stryker trying to free herself. Though the original version was known for being a powerful telepath, this version does not displat access over telepathic abilities.

Emma Frost in X-Men Legends
Video Games:
X-Men Legends
Emma was a playable character in X-Men Legends, mainly using her powers to confuse enemies or to help the payer for a limited amount of time.
X-men Legends 2
She also appeared in it's sequel, X-Men Legends 2, as a NPC ( Non-Playable Character ) who helped the X-Men in their mission in Madri Temple after she telepathically contacted Professor X about the Cuckoos starting rebellion in Madri.
X-Men: Arcade Game
Years Prior to the X-men Legends series, Emma Frost was a non playable character in X-men: The Arcade Game. She was the Boss of the second level and would use her mental attacks to harm the players.