Mirai Shishiou

Initial Age (mental): 6
Initial Age (physical): 12
Height: 139 cm (4'7")

Mirai is the beloved little sister of Tsukasa. Mirai was clinically brain dead prior to the Petrification, the doctors saying she'd never wake up. Tsukasa refused to give up on her and took on his MMA matches to keep paying the medical bills that kept her on life support.