Kenma's little sister Kozume Kenna was home schooled on the account of her delicate health. The only people she hung out with was Kenma and Kuroo. With the Doctor's approval she is allowed to move from Tokyo. Deciding this because she feels like a burden on her family especially her brother she ends up attending Karas...
Kageyama Yukio. Kageyama Tobio's Older brother. He was separated from his brother after their parents had a divorce. Though it not only upset them, this caused Tobio to hate himself thinking his brother hated him. Without him realizing his brother felt exactly the same. Both are genius prodigies but Yukio seemed to b...