Nightside is a member of the Imperial Guard
, a multi-ethnic group of super-powered alien beings who act as enforcers of the laws of the Shi'ar Empire
. She was amongst the first of the Imperial Guard encountered by the team of mutant adventurers known as the X-Men
who sought to rescue the Princess-Majestrix Lilandra
from her insane brother, then-Majestor D‘Ken
. Following the orders of their emperor, the Guard clashed with the X-Men and were on the verge of winning when the band of interstellar freebooters known as the Starjammers
arrived to turn the tide of battle in the X-Men's favor.
Nightside was later amongst those few Imperial Guard members who opposed the treacherous Shi'ar High Council member Lord Samedar who was aiding an attempted coup of the Shi'ar throne by Deathbird
. Even after many of the Guard chose to side with Samedar, Nightside remained steadfast in her loyalty to then-Empress Lilandra.
Later, after the formerly-exiled Deathbird had usurped the Shi'ar throne, Nightside was amongst those Imperial Guard members who clashed with the British team of costumed adventurers known as Excalibur and the Starjammers over the fate of the then-bearer of the Phoenix Force, Rachel Summers.
During the war between the Shi'ar and Kree Empires, Nightside was part of a small team of Guardsmen who were charged with preventing the member of the Earth team of super-powered beings known as the Avengers named Quasar from retrieving the legendary Nega-Bands of the Kree warrior Captain Mar-Vell, which had been stolen.
When the Empress Lilandra, having regained her throne, learned of the many Earth heroes that had sacrificed their lives to stop the malevolent psionic being named Onslaught, she dispatched eight members of the Imperial Guard, including Nightside, to protect Earth. While on Earth, the Guard uncovered a plot by a militant Kree faction to simulate a radical political activist group in revenge for Earth's involvement in the Kree/Shi'ar war. In reality, the group created a "nega-reactor", similar to the bomb that was used on the Kree. However, this plot was stopped by the Guard, but not before the reactor was used by the Kree's leader, the Supreme Intelligence, to re-incorporate itself after being presumably killed at the end of the war.
Subsequently, Nightside was amongst those Imperial Guard members who defended Lilandra against an assassination attempt by the Kree Ronan the Accuser and his unwilling agents, the royal family of the Earth race known as the Inhumans.
Participating in the Shi'ar attack on the wedding of Ronan the Accuser and Crystal of the Inhumans, Nightside recently perished in battle against Inhuman warriors, who used echo weapons to impale her.
Nightside was created by Chris Claremont
and Dave Cockrum
in 1977 and first appeared in X-Men
Age of Apocalypse
As in the regular Marvel 616 universe, Nightside was a member of the Imperial Guard in this alternate reality. Along with Gladiator and the rest of the Guard, she confronted Gambit and the X-Ternals, mistaking them for enemies when they teleported to the M'Kraan Crystal. With the help of Rictor, Nightside and the Guard attempted to capture the mutants, only to be killed by the M'Kraan's expanding crystal wave while Gambit and his team escaped.
Like many members of her race, Nightside is a shadow caster. She is able to draw darkness from the extradimensional Darkforce Dimension
. Others believe her powers is inherent, but she keeps it as a secret that she draws it from another dimension. With her power, she can displace projectiles, create darkness, or teleport her opponents into the void.
Nightside also has the ability to fly, though this may be due to an Imperial Guard "flight belt" rather than her own inherent powers.