Rumi's younger twin sister. Ruka is shyer than Rumi. However, sometimes she becomes just as emotional as Rumi. Ruka was infected with a virus at an old burial mound, and she gets supernatural powers (flying in the sky and the power to pass through objects), and an antibody to the virus which Rumi scatters. Ruka falls in love with Touma Katsuyuki, finding herself torn between her love for him, and her love for Rumi - who loves Katsuyuki too, and is violently possessive of him. However, she hopes that she can reconcile with Rumi.

Lumi and Luka Kobayakawa are identical twins who both are members of the track team and have a crush on a handsome upperclassman Katsuyuki Tohma, but he chooses the latter. While Luka doesn't want to hurt Lumi's feelings, Lumi feels betrayed by her own sister. On their way to the party celebrating the graduation of eldest members of the team, they take shelter in a cave, which turns out to be a mass grave, and all members were killed by the strange smell from the cave, with Lumi and Luka only survivors. After the tragedy, Lumi has become a completely different person, and one day she literally emerges from the floor of Luka's room...
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(Source: Anime News Network)

__Height:__ 156 cm

Wife of [Keiichi Nanba](https://anilist.co/staff/96026)

Ruka Kobayakawa