Eye Flame

The eye flame is one of the defining features of Black★Rock Shooter. Although some other characters also exhibit a similar visual feature, it is most closely associated with multiple iterations of Black★Rock Shooter in various derivative works.

Original Concept
A blue flame is present on Black★Rock Shooter's left eye, and this becomes one of the recurring visual feature for the character's other iterations elsewhere. Insane Black★Rock Shooter features a purple flame on her left eye.

An early version of Black★Gold Saw features a red flame on the right eye, which is not present in later artwork.

OVA
Black★Rock Shooter is seen emitting a blue flame on her left eye when fighting Black Gold Saw and Dead Master in the OVA.

Black★Rock Shooter: Innocent Soul
In Black★Rock Shooter: Innocent Soul, all Black Stars exhibit a flame on their left or right eye in combat. Acta, Dead, and Ram have theirs on the right eye, whereas Rock has hers on the left eye.

Black★Rock Shooter THE GAME
Stella emits a blue flame on her left eye in the game, which is seen in the story's final mission, as well as during some skills' activation in battles, namely Aggressor, Defender, Ignition, Regenerate, and Skill Burst.

In contrast to Stella, WRS emits a pink flame on her right eye.

Black★★Rock Shooter DAWN FALL
Empress can emit a blue flame on her left eye, which is seen in two occasions in Black★★Rock Shooter DAWN FALL: during the battle against Lunatic in Mountain View shortly after Artemis' uprising,   and the battle to destroy the Orbital Elevator approximately 20 years later.

Black★Rock Shooter FRAGMENT
All known BRS fragments, including but not limited to Elishka and Hilke, possess the Burning Evil Eye (燃える魔眼, Moeru magan).

Gallery
Full article: Eye Flame/Gallery