Ratchet

Ratchet is a street-wise, headstrong lombax who shows immense bravery and enjoys challenges. He cares about protecting people of the galaxy but particularly cares passionately about his close friends and his homeworld of Veldin.

Sunset Shimmer
Sunset fell in love with Ratchet.

Clank
Clank is Ratchet's best friend.

Avocato
At first, Ratchet thought Avocato was a lombax and he tells him that he's a ventrexian. They even found out that ventrexians are closely related to lombaxes. Avocato decides to adopt Ratchet and they began to share a father-son relationship.

Little Cato
Ratchet acts as a older brother-figure to Little Cato. When Avocato adopted Ratchet, he and Talia accepted him as their brother.

Talia
Ratchet and Talia share a brother-sister relationship. When Avocato adopted Ratchet, she and Little Cato accepted him as their brother.