Yamoto Koki (ヤモト・コキ) - Ninja Slayer (ニンジャスレイヤー) From Animation

yamoto koki, short hair, black hair, blue eyes, serafuku, white uniform, black collar, black neckerchief, (black sleeves:1.2), short sleeves, black skirt, pleated skirt, black kneehighs, loafers,