Rumi's twin younger sister. Ruka is shyer than Rumi. however, Sometimes, she becomes emotional like Rumi. Ruka was infected with a virus at an old burial mound, and she gets supernatural powers (flying in the sky and power pass-through), and an antibody to virus which Rumi scatters. Ruka fall in love with Touma Katsuyuki, she is in a dilemma of love for Katsuyuki and love for Rumi. Ruka confronts Rumi with Katsuyuki. however, She hopes that she is reconciled with Rumi.
Vova
