He speaks using signs and says "LMAO" a lot. He is a dog who frequently destroys the house and rarely listens to Yu Sumin.

The owner of Ttangttangi, Hyunsiki, Saedaegal, and Syumdyangi. He is a human who swears a lot.

He often says "Hey, you f*cking bastard!" and ends every sentence with "-ttang" or "-kkang."

He often asks "But who are you?" and swears a lot. He is the smartest among the Beast Friends.

A rat who ends every sentence with "-dyang" or "-syum." She is the kindest among the Beast Friends and is capable of growing into a giant.