|乙川 澄||Otokawa Sumi|
|Birthday||May 30th, Gemini|
|Anime||A Cherry Blossom-colored Beginning|
Sumi has long dark hair and brown eyes. She has fairly short-stature.
Sumi is a lively teenager. Her most distinctive trait is her particular speech pattern, as she often ends her sentence with "no ja" (similar to how older people in Japan talks). This is inherited from her grandfather, whom Sumi holds in high regard. However, whenever Sumi gets excited or upset she reverts back to normal speech. She seems quite fond of fake mustaches. She also likes to grope other girls' breasts.
- Voiced by Momo Asakura
- Her symbol is a fake mustache,
- Her nickname is "Sumisumi", which she detests.