Mirai Sasaki (佐さ々さ木き未み来らい Sasaki Mirai?), also known as Sir Nighteye (サー・ナイトアイ Sā Naitoai?) was a Pro Hero and Mirio Togata's mentor. He was also formerly a sidekick and was considered to be the brains of All Might.

He'll Be Return In Little Witch Academia/My Hero Academia Crossover Show.