When they're kids with diapers, Kid Toums Yoimachi is gonna to pee in his diaper because he's sucking his own thumb in his mouth. Kid Kairi Yamo clings on Kid Touma Yoimachi because he's soaked his diaper so Baby Even is shocked

Kid Touma Yoimachi : fart & baby babble (He/him)

Kid Kairi Yamo : baby babble & soaks his diaper a lot (He/him)