That is a really hard one because both characters have really different and enticing qualities! Tomoe is the moody, handsome bad boy with a past, and Mizuki is this adorable, nonchalant (but secretly deviant) dork. I think it depends on what personality type 당신 prefer, but honestly, I 사랑 Mizuki because there never seems to be enough of him in the 망가 또는 the anime