MC actually kind of prodigy. He has no visible weakness, even to readers. He act low and like of servant of horikita, in truth he doesnt. He use horikita as his shield to conceal his presence as the real one who control the D class (which later become C). He’s never yield and succumb to anyone, and even use their weakness as his pawn to collect and control information. In later chapter, MC even show his physical superiority and beat some people who is in his way to make them realized they are dancing in his palm. MC isnt really want to become A class, actually his teacher kinda lied to him so he’s forced to do so. For relationship, I couldnt see anyone would become MC couple, and forget about horikita and kushida potential. Actually, in latest chapter he even make some amazing character kind of fall to him and he doesnt feel any.