Shirakawa Chika
白河 千佳
| Shirakawa Chika白河 千佳 | |
| Aliases | Chi-chan |
| Hair | Sidehair, Straight, Waist Length+, White |
| Eyes | Violet |
| Body | Pale, Teen |
| Clothes | Hairpin, Kemonomimi Hat, Mary Jane, Pajamas, Shrug, String Ribbon Tie, Sundress, Thigh-high Stockings |
| Personality | Relaxed, Stoic |
| Role | Non-blood-related Sister, Student, Younger Sister |
| Visual novels | Main character - Happy Sister Utopia! |
| Voiced by | Katou Yukishiro |