Chiriko has white-pinkish hair with pink highlights, scarlet eyes, pale skin and big boobs, though they are smaller than Akira's. She possesses a rather soft and slightly high-pitched voice.
In her first appearance, she wears a cat-eared hoodie, matching the color of her hair highlights, over a white dress shirt and a gray pleated skirt. For footwear she goes with black mary janes, accompanied by light gray socks.
She heavily resembles Chiaki Nanami from the game Dangan Ronpa 2: Goodbye Despair, the author even admitting it on Chapter 25 in an author's note.
Chiriko is very mean-spirited, patronizing and smug. Upon meeting Azusa Tachibana, Chiriko immediately insults Iwatobi, and calls Azusa an "emo bitch", later she even throws a sexually explicit insult at Azusa.
Chiriko intially approaches Azusa and taunts her, claiming that Iwatobi is a "shithole" of a school. She continues to insult her, makes grimaces and is generally rude towards Azusa. Their relationship isn't the greatest, to say the least.
On Chapter 37, Azusa and Chiriko meet again, with Chiriko telling Azusa that on the next swim meet, she'll defeat Azusa as she practiced harder than before, nearly reaching the almost perfect mark.
- Character-critique-central theorizes that Chiriko is likely Chiasa Tachibana in disguise.
- Chiriko's appearance is based off of Chiaki Nanami from Dangan Ronpa 2: Goodbye Despair Academy (also known as Super Dangan Ronpa 2, or SDR2).
- Even though her eyes are said to be scarlet, they look orange on the cover image of chapter 25.