Hamatsu dressed up as Mai for the Summer Comiket dojinshi manga gathering, which is also Japan’s biggest cosplay event.
It’s a made-in-China bootleg Attack on Titan one-piece swimsuit that you can buy for about 1,000 yen [US$9.25].
However, Comiket is a multi-day celebration, and on Day 4, Hamatasu switched things up by cosplaying as Sasha, the potato-loving (and curry-inspiring) Survey Corp member from Attack on Titan.