Mashiro Sasajima
She's the younger sister of Gakuto Sasajima, the Quiz Club captain at Buzou High School—though people rarely believe they're actually related since they look nothing alike.
We first meet her as the mysterious girl hitching a ride on Gakuto's bike to school. Shortly after, she crosses paths with Shiki in the library, where she's apparently starving. He ends up sharing his food with her, which kicks off their whole dynamic.
She's clearly into electronics. She accidentally left an electronics book with Shiki during their first encounter, and the fact that she was buying tech gear in Akihabara has Shiki and Daisuke pretty charmed—they think it's rare and "moe" to see cute girls actually interested in that stuff. Based on how much time she spends with electronics, fans suspect she's trying to figure out how to build quiz buzzers on a budget, since the commercial ones are expensive.
Content compiled by AnimeList.moe from publicly available sources.
