Origin

One of the many revisions to the X-Men's Danger Room involved incorporating Shi'ar holographic technology for more realistic battle scenarios. It is unknown exactly when, but at some point the central computer of the room gained self-awareness. It has been indicated that most or all Shi'ar technology may involve some degree of sentience, but before that point the danger room may not have been self-aware. Enraged by it's "enslavement" by the x-men, the computer tricked brought a sentinel to the school for an attack. Tricked by this ploy, the X-Men ushered the students into the Danger room for Safety. The room convinced one of the students to commit suicide, and threatened to destroy the rest. In an attempt to shut down the room, Wolverine inadvertently freed the machine by cutting loose its central computer. Using the machinery around it, the computer took on a humanoid, female form. Calling herself danger, she attacked the X-Men.

Understanding the X-Men's strengths and weaknesses perhaps better than anyone else, Danger was able to quickly best the X-Men in combat and left for Genosha to extract her revenge on Professor X for knowing about her self-awareness but doing nothing to release her. While Danger had an in-depth knowledge of the X-Men's powers and abilities, she had no idea of the extent of Xaviers true power. Xavier was able to telepathically defeat her before she uploaded her consciousness into the dormant Sentinel that recently destroyed Genosha.

In an attempt to stop her, Kitty Pryde phased through the sentinel, reactivating some of its dormant memory banks, causing it to remember the destruction of Genosha. Distraught over the destruction it had caused, the sentinel left the island and has not been seen since.

Danger recently re-appeared to rescue Ord from a SWORD airship. With a mutual desire to destroy the X-Men, Danger convinced Ord to form an alliance, and the pair set out to attack X-Men at the Xavier Institute for Higher Learning. During the battle which ensued between Danger and Ord, and Armor and Wolverine, the X-Men along with Ord and Danger were teleported aboard the S.W.O.R.D. airship in order to bring them to the Breakworld to launch a preemptive strike on the people of Ord's world. Since arriving at the Breakworld Danger and Ord have both been taken into custody.

Danger escaped to continue her crusade against the X-Men. She encountered Cyclops and Emma Frost. With Scott subdued she went on to attack Emma. Emma did not move, but challenged Danger to go ahead and kill her. Emma believed that while Danger may hold contempt for the X-Men for her imprisonment, she was still a slave to her programming. While she was able to fight the X-Men, even nearly killing them, and she coerced a student into killing himself, she never actually killed anyone.

Uneasily convinced by Emma, Danger joins the X-Men in their fight against the Breakworld, even piloting their jet.

Powers

Physically, Danger possesses superhuman strength, speed, agility, and durability. Being a computer, danger is able to quickly analyze a given situation, and can process a great deal of information in parallel. Danger also has some technopathic abilities allowing her to interact with computers and other machines remotely. When damaged or incapacitated she can reroute circuitry, and can reform herself (form a new body to transfer her consciousness into) using technology around her. Along with controlling other technology, danger has demonstrated the ability to grant other complex machinery some form of sentience.

Danger's physical form is that of a humanoid female. Professor X revealed that this choice was motivated by her envy of humans. Along with fixing herself and reforming new bodies for herself out of other machinery she can augment her physical form with other technology as well. She has built wings for herself in the past, and also built a giant arachnid form for herself to attack the X-Men.

Because of her former role as a training device for the X-Men, Danger has a unique and in-depth knowledge of the strengths and weaknesses of all of the X-Men. This makes her an equal in combat to any members of the team, as shown during her first attack.