Iroha is a 1st-year student of class 1-C in Sobu High school, introduced in Volume 7.5. Hachiman sees her as a “not cute Komachi” or a “better version of Sagami.”
She acts in front of anyone to maintain her “cute appearance” with the image of an innocent girl in order to keep her image well with others, but she is a sly and crafty girl underneath. She shows her true color to Hachiman and Tobe, which irritates the former while the latter is unaware of it.
