Carlitos is the youngest son, as well as the youngest child of the Casagrande siblings.
Carlitos is a joyful and curious toddler. He likes mimicking his family, his pets, and even guests, and will often be seen playing happily with plush toys or animatronics. Carlitos is often seen playing games with his brothers and/or his pets due to them being the most playful members of the family, and is also commonly seen socialising with Carlos and Frida.
He is smart enough to understand the concept of keeping a secret, and because he cannot talk yet, he uses sign language to communicate. His intelligence is also showcased by him being able to help his brothers prank the girls and think of a relatively logical plan to acquire a stuffed penguin.
Like his older brothers, Carlitos has a mischievous side-- as mentioned above, he likes to prank Carlota (and later Ronnie Anne as well) when she's left in charge, and he also once joined in with his brothers on misbehaving to get the babysitters to give up.
Carlitos is a Mexican American toddler, with two front teeth, a strand of orange hair, and has thick black eyebrows. He wears a white shirt, red shorts, and black shoes.
Carlitos is the only Casagrande sibling with red hair instead of black.
He is also the only member of the Casagrande family never to have black hair. [note 1]
He is also the only Casagrande sibling without a full set of teeth.
His Polish name is Kamil.
He is the fourth character to change voice actors/actresses, with the first three being Lincoln, Clyde, and Ronnie Anne.