Scintilla is a member of the Shi'ar Imperial Guard and she originally held the politically incorrect codename of Midget. She has served the Shi'ar through all of the leaders and she was one of the very few to survive Vulcans assault upon the Imperial Guard. The original Imperial Guard was created as an analog to DC Comics' Legion of Superheroes and it is assumed that Scintilla was created as a counterpart to Shrinking Violet.
Age of Apocalypse
As in the regular Marvel 616 universe, Scintilla 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-Force, mistaking them for enemies when they teleported to the M'Kraan Crystal. With the help of Rictor, Scintilla 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.
It is not known what alien race Scintilla belongs to. She has the ability to change her size and mass, giving herself proportionately increased strength. She also can fly with the use of her "flight belt".