Kazuki Kuwanomi

Kazuki is Tsukasa's boss. She was once Isla's spotter, and she is very protective of her.

[Spoiler] She sustains a severe foot injury after it's hit by Michiru's Giftia father while she was trying to shield Michiru from him.

Unfortunately the doctors are forced to amputate it due to the severity of the damage, and it was at this moment she stopped being Isla's partner. [/Spoiler]