Mizuki in Chankon-kun mode!
I just can't get over when Mizuki goes full Chankon-kun (it's sort of an in-game mascot character with a very questionable visual design that makes the joke easier to make) mode with her cute voice and mannerism. She's just too ridiculous and funny. Haruno Iroha / Miyake Marie did an amazing job voicing her and I should really go and check the other works where she worked on as a seiyuu.
Everyone loves Chankon-kun! Plus seems like there's actually even special goods made for this ingame character. I would actually buy one of these just to have fun if they made them in real life...