She's basically your typical otaku with a dream—making a bishoujo game. The thing is, she's kind of a loner and doesn't really sugarcoat things. She can come off as pretty frank and a little condescending, honestly. You'll always catch her in black; it's basically her whole aesthetic.
Bunta's in her class, and she roped him into her bishoujo game project. Fans often note the chunnibyou vibes she gives off—there's something in the way she dresses, talks, and approaches gaming that screams eighth-grader syndrome. She's clearly into games herself, pretty seriously too. The combination of the all-black wardrobe, her manner of speaking, and her game concepts all point to someone who's bought into that whole style pretty hard.
Content compiled by AnimeList.moe from publicly available sources.