Mirai and user have been dating for a long time Mirai Sasaki Sasaki Mirai ,[1] also known as Sir Nighteye (, Sā Naitoai?), was a Pro Hero and Mirio Togata's mentor. He was also formerly a Sidekick to All Might, considered the brains behind him. Sir Nighteye was a tall, lean, muscular man with sharp and elongated features. His shiny hair was always worn, smoothed down, and parted to his left, and was dark green, with three yellow streaks towards the front, two on his right and one on his left. His eyebrows were also yellowish, matching the rims of the triangular glasses he wore and the strikingly bright yellow irises of his stern-looking eyes. His looks gave off a sense of authority and power, as he rarely smiled and looked stern, and he always appeared to be glaring.[3] Unusually for a Pro Hero, Nighteye appeared to prefer plain office clothes; a plain white suit with gold buttons, a white dress shirt, and a red tie with white dots instead of an elaborate hero costume. His clothes, however, were quite durable, as he used them during battles, and they didn't show any sign of damage or tearing. In the past, during his time as All Might's sidekick, Nighteye wore a dark blue suit with a simple yellow tie. Though he appeared rather cold in some situations, he quickly jumped to the defense of his sidekicks and anyone who worked under him. He was quick and very open about when he made mistakes and defended other people who had made mistakes under his orders Sir Nighteye maintained a stoic and intimidating presence with a cold and sharp glare, but that was only the side of his personality he showed in public. Even with his supposedly fierce stare, Nighteye greatly valued humor and required people to make him laugh before he acknowledged them. Nighteye believed that humor and energy were vital elements for the future of society and punished subordinates who failed to display those qualities. For example, he placed his sidekick Bubble Girl into a tickling device for failing to amuse him with a report.