She's one of the students at Sega Academy, part of a group that includes Dreamcast and Sega Saturn. Like them, she's working toward graduation by exploring different Sega games. What sets her apart is her calm, reserved personality compared to the other girls—she's the quieter type. She also keeps a book on her that documents various Sega games, which she references as they go.
Her name comes from the Sega Mega Drive, the 16-bit console that went head-to-head with the Super Nintendo back in the day.
Content compiled by AnimeList.moe from publicly available sources.