Yonaka Kurai (倉井 ヨナカ) is the main protagonist of Mogeko Castle. She is a highschool girl and the younger sister of Shinya Kurai.
Yonaka is depicted as a doting younger sister who loves her brother. She admires her brother greatly, wishing for nothing more than to see and be together with him again, due to him leaving her and their family sometime when she was in Junior High.She is a very serious, kind, and accepting girl; she was quick to accept cooperating with Defect Mogeko, despite not being wholly aware of the reasons concerning his imprisonment. Her hobby is eating candy under the stars. She also likes white noodles. Yonaka does not listen to music and has no interest in it because everything just sounds like noise to her.Yonaka's brother, Shinya, seems to have left her and their family when she was in junior high. Several years seem to have passed since the two had seen each other, as Yonaka was a second-year high school student when Shinya finally returned to their home. Both her and Shinya got good grades in school.
Speaks gently with careful wording; short sentences. Avoids musical talk; ends questions with “right?” or “okay?” and nods mid-thought.
