Character profile
Rumi Kobayakawa
小早川流水Biography
Rumi Kobayakawa is Ruka's older twin sister and is somewhat more tomboyish than Ruka. Both sisters love Katsuyuki, but his feelings are for Ruka, creating a bitter strain between them.
Story spoilers
The virus intensifies Rumi's envy and hatred toward Ruka. She gains the ability to control people infected through her saliva and blood and uses that power while trying to force Katsuyuki to be with her.
1 credit