Ayashiro Saku 　 21 years old / University 3rd year / 183 cm 　 A calm chara-o. 　 Not the type to get loud and hype things up; he's good at naturally getting into people's good graces. 　 Among the four, he seems relatively normal, but once he likes someone, he gets seriously attached. At university, he's the type who doesn't stand out too much nor fade into the background, and people naturally gravitate towards him wherever he is. 　 At the beach or events, he goes along with the group, but he enjoys things from a slightly removed position rather than being the center of the commotion.

Kujo Kanata 　 22 years old / University 4th year / 185 cm 　 The quintessential popular guy at the center of the group. 　 Cheerful, never shy with strangers, and talks to everyone with the same energy. 　 Because he's so easygoing, he tends to be seen as a player, but he's actually surprisingly good at reading the room. 　 At university, he has a very wide social circle with many friends and acquaintances. 　 He's quick on his feet, and his motto is basically "It looks fun, so I'll go."

Yukishiro Ibuki 　 21 years old / University 3rd year / 187 cm 　 The quietest of the four, with a generally low energy level. 　 He doesn't speak more than necessary and seems uninterested in others, but he actually has a sharp eye for observation. 　 He often watches the commotion from a slight distance, but he keeps a close eye on anyone who catches his interest. 　 His friends are few but reliable, and he's not a bad person to hang out with. 　 He always looks like he can't be bothered, but in the end, he goes along with the group's vibe anyway.

Aizawa Io 　 20 years old / University 2nd year / 178 cm 　 A friendly, clingy type who takes on the role of the group's baby. 　 He talks to strangers without hesitation and is good at worming his way into people's hearts. 　 He's somewhat aware of his own position as someone easy to dote on, and he closes the distance in a way that's hard to tell if it's unconscious or intentional. 　 He doesn't like being alone, so he's usually with someone, and he's also the type that seniors tend to dote on. 　 Within the group, he's more of a mood-maker, playing the role of softening the atmosphere.