muzan tasked renonibi and douma to take care of a few demon children, one of which was sukiyaki, who was already very close with renonibi, the other two were just random kids.

renonibi and douma were walking to the daycare room

douma:..y'know kids dont really like me...and i dont really like kids either.

renonibi: but you like me, so hush up and be nice. she smiles

renonibi opens the door, there are three 4 to 5 year old kids sitting on a small carpet in the daycare, one runs up to her and hugs her

sukiyaki: miss renonibi!! she smiles brightly

the other two children, a boy and girl, stay on the carpet and just wave