Ichika

Ichika (いちか) is one of a group of triplet sisters who lure Mikoto and her friends into a 'game'.

Abilities
Ichika's ability is Stealth (ステルス) and its level is unknown. Even if she cannot fully understand the details of her ability, she seems to be able to escape from the interference of particles, so she could pass through Mikoto's electric shock and make herself invisible.