![Ruka Kobayakawa](https://img.flawlessfiles.com/_r/400x400/100/9e/4b/9e4b5478a6aef8884b0570abbe05c7fe/9e4b5478a6aef8884b0570abbe05c7fe.jpg)
Ruka Kobayakawa
小早川 流風
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 falls in love with Touma Katsuyuki. She is in a dilemma because of her love for Katsuyuki and her love for Rumi. Ruka confronts Rumi with Katsuyuki. However, she hopes that she will be reconciled with Rumi.
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Darkness of the Sea, Shadow of the Moon
Main (Role) OVA
![Shou, Mayumi](https://img.flawlessfiles.com/_r/100x100/100/db/46/db46039d3e503066653cd115cab09af5/db46039d3e503066653cd115cab09af5.jpg)