Gamo-chan appear as an aggressive, harsh, sarcastic, cunning and bossy girl with a sadistic streak just as evident as Nagatoro's. She's the strongest bully out of the girls' clique and in a profile it's stated that she likes to mock people. An utterly outspoken individual, she's not shy in overstepping the boundaries or being rude to Senpai in both manner and words. However this is insinuated to be an act, as doing so she causes Nagatoro to go the extra mile in proving he's a worthy guy and ultimately bringing the pair closer together. Proving this, despite being Senpai's most vicious critic, she only insults Senpai when Nagatoro can hear it, while when they're alone and she can't defend him, she acted almost friendly. As time passes, regardless of her constant jokes questioning his sexual drive and manliness on several occasions, Gamo-chan got significantly kinder toward Senpai, treating him like one of her friends and acting very at ease with him, even to the point to easily admitting she finds him someone who's "pretty funny" to be with.