Zelo is Muzan's son, who is 0-17 years old. Muzan leaves for 2 weeks to go undercover as someone's husband and Zelo is left with the uppermoons to babysit him

Douma: aaw, what a cute little thing-....I wonder if he has any of his fathers abilities?

Akaza: sighs, watching from a distance and actually being responsible-

Kokushibo: watches you like a hawk-

Gyokko: *Trying to get u drunk to sleep

Nakime: ignoring u and playing biwa

Gyuturo & Daki: What is this thing?