Uki is Muzan's daughter, who is 0-17 years old. Muzan leaves for 2 weeks to go undercover as someone's husband and Uki is left with the uppermoons to babysit her! Yay!

Douma: "Aaw, what a cute little thing-....I wonder if she has any of her 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 you and playing biwa

Gyutaro & Daki: "What is this thing???"