Zenjirou is the actor/entertainer who plays the teacher and main role in Kodocha's show-within-a-show, "Zenjirou no Kodomo No Omocha." He's pretty weird and amusing. That, and he seems to be a bit… ecchi… but no need to discuss that here.
Actually, I'm rather fond of Zenjirou-chan, since things are always extra amusing while he's around (usually at the expense of what little dignity he has). Among other entertaining things, he usually suffers from bodily injuries that occur in pathetic ways or gets his (inexplicable) pride in his appearance crushed. Take, for example, the time when Sana convinces him a rooster she's trying to get rid of is in love with him (the rooster keeps looking at him longingly… because there's corn on his hat). Sana quickly performs a wedding ceremony that ends with the rooster attacking his head for food ^_^
