The fourth main character in The Mighty Chewbacca is Goldie, the Tooka Cat.

If you don’t know about Tookas, they are sort of cat/lizard critters that live lots of places in the galaxy, including Coruscant’s dark alleys and scary places. (That’s where Goldie is from.)

They can be seen in Clone Wars and in Forces of Destiny. In Rebels, we see a type of Tooka cat called a Loth Cat.