百石マカ

A subordinate under Intermedius troops, who is ranked Number Three.
She is the younger twin sister of Momoishi Moka, a member of the 8th Training School. She has an inferiority complex against Moka, which lead her to join Gotou Faction.
Her ability to manipulate sounds is very powerful, but it has many limitations that only she knows about. Because of this, it is considerably difficult for her to play an active role in combat.