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- Official name:才川リコ
- English name:Riko Saikawa
- Chinese name:才川莉子
- Other names:さいかわ りこ
- Gender:Female
- Birthdate:Aug 21
『Riko Saikawa』
Kanna's classmate in elementary school who is initially hostile towards her but soon develops a crush on her, a running gag that involves this character is that every time she and Kanna make contact, Saikawa immediately blushes with bliss.