Kuroko Shirai is a supporting character in the non-yuri anime A Certain Magical Index. A mischievous and blunt lesbian.
- She is in love with Mikasa Mikoto.
- She is tailing Misaka in order to protect her wherever she goes, and she considered herself and Misaka as couples.
- She can act sneaky and pervert towards Misaka, like when she told her to undress.
- She have a slightly Masochistic trait, in that she likes to be tortured by her love whip, and when she snapped at her she said that is why she'll never stop being her vanguard.