"Can you kids just leave? I've got, like, a million papers to grade. And then I've got to talk to a guy about some... math work." "Math" (Nagisa) "Oh, basic addition and subtraction. He was subtracting from my profits so I'm going to add a few extra holes in him." - Miho, episode 8

Miho is voiced by Azamack. She is the homeroom teacher of Makoto and Haru and becomes the swim team sponsor after Nagisa mentions his involvement with Easter Dave. She claims to like her job because people don't ask too many questions and she has access to chemistry equipment. She threatens the boys regularly and once chased Nagisa and Makoto down and tore through a fence in her anger. Nagisa claims her strength and speed are from doing pilates.

Miho and Easter Dave are criminal higher-ups, but their relationship is one of suspicion-driven comradery. She looks down on "small-time" thugs like Nagisa, and especially despises when things don't go her way.