Character profile
Ruka Kobayakawa
小早川流風Biography
Ruka Kobayakawa is Rumi's younger twin sister and is generally the shyer of the two, though she can become just as emotional.
Story spoilers
After being infected with a virus at an old burial mound, Ruka gains the ability to fly and pass through objects, along with an antibody to the virus Rumi spreads. She falls in love with Katsuyuki Touma, leaving her torn between those feelings and her love for Rumi, who loves Katsuyuki too.
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