Kuroka

Kuroka is the older sister of Koneko (then as Shirone) who was born to a rare species among the Nekomata, called the Nekoshou. After losing her parents, she and her sister were later taken in by an unnamed Devil, and she was reincarnated as the Devil's Bishop using two Evil Pieces.

While serving her master, she became extremely talented in Senjutsu and Youjutsu, and her magical power as a Bishop became so great that she surpassed her own master in terms of magical power alone. This later became her undoing when she later became a Stray Devil after she killed her master, with everyone assuming that she was drunk with her own powers, but the real reason being to protect her sister from her master, and became the cause of her sister's near-execution and depression as well as the reason why she refuses to use Senjutsu and Youjutsu. Following the incident, she became one of the Underworld's most wanted criminals, ranking at SS-Class.

At some point before the series, she joined the Khaos Brigade.