Shikishima Koko
シキシマ ココ
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| Shikishima Kokoシキシマ ココ | |
| Hair | Brown, Long, Twin Tails |
| Eyes | Blue |
| Clothes | Keikogi, Maid's Dress, Old Type School Swimsuit, School Uniform, Thigh-high Stockings, Turtleneck Sweater |
| Personality | Reserved, Timid |
| Role | Half-sister |
| Visual novels | Main character - Himesho! |
| Voiced by | Kawashima Rino |