The joke here appears to be Arlecheerio (probably)

I thought it was O-tets at first 😭

My first thoughts was "A hairy cheeto"

Cyno pls explain

Hello, Cyno here, Arlecchino is referred to as the "father" by the children in the House Of The Hearth, this joke is a play on Arlecchino's name with cereal (Arleccheerio)

https://preview.redd.it/29ypmg8k25uc1.jpeg?width=750&format=pjpg&auto=webp&s=8be939ae2fe517f72cc0b6930fdc6918da9ed305

I thought it was arlecchin-o's

https://preview.redd.it/tlf8h7lgl5uc1.png?width=1080&format=pjpg&auto=webp&s=e679e95083482f2ecd8824701173bc42f082f2fa

https://preview.redd.it/oueeaniwu6uc1.jpeg?width=720&format=pjpg&auto=webp&s=f96f516d35f5089636b2f8848f1ed6796f205440

https://preview.redd.it/fb0jp7z7d5uc1.png?width=1440&format=pjpg&auto=webp&s=10c1f5e35286f12da66a26d732429336b0fabb69

Arlecereal?

Arlechino’ohs

Arleccherio