Aiko Kudou

She is portrayed as a green-haired, friendly, easy-going and mischievous girl. She uses 'boku' (僕), the word for "I" commonly used by boys or young men, to address herself. She especially likes to mess around with Akihisa and Kouta, often stating perverted things to arouse them and causing them to nosebleed. It is highly implied that she likes Kouta, which is supported in S2 EP1 while trying to get him to look at her bathing suit. She states that she learns PD/H/PE "practically", unlike Kouta who sits and takes notes. She is the only main female character who does not intentionally harm any male characters.