Insane Black★Rock Shooter

Insane Black★Rock Shooter(インセインブラック★ロックシューター, Insein Burakku Rokku Shuutaa) is presumed to be another form of Black★Rock Shooter. She does not appear in the OVA. Her bladed weapon does appear in the OVA however. She first appeared on huke's blog and his pixiv account.

Appearance
Compared to Black★Rock Shooter, Insane Black★Rock Shooter has purple eyes with a flame of the same color emerging from her left eye and fangs. Her outfit is a black armor, covering her chest, left arm and legs. Her jacket is a torn black cape and her entire right arm is a robotic appendage holding a vicious blade. Her hairstyle resembles the same as that of BRS, she wears a black crown-like object with a white cross design which wraps around her longer lock of hair. A few chains wrap around her hair and on her waist.

Trivia

 * A popular fan theory holds that Black★Gold Saw and Black★Rock Shooter "fused" to become Insane Black★Rock Shooter (evidence to support this can be "blue+red=purple"), but this has not been confirmed in any way. A drawing has been made for this theory.
 * I.BRS is one of the few characters based on BRS herself. The others are Mato Kuroi, BRSB, and WRS.
 * The shouting expression of WRS in the figma maybe based on I.BRS, seeing in that expression that she bares fangs, much like I.BRS.
 * She is the only character with a symbol that doesn't appear in the anime or in-game (but there's weapon based on her humongous bladed weapon which appears in the OVA).