萌白 夜

Teki's younger brother. Since their parents divorced before he was born and Teki was raised by her father, she didn't even know when Byakuya was born.

He is perfectly capable of doing all household chores and knows most recipes by heart. His body is weak and he has no physical strength. Although usually reserved and quiet, he also has a stubborn side of himself.

[Translated from official website]