He is Tommy Pickles's best friend, the son of Chaz and the late Melinda Finster, stepson of Kira Watanabe Finster, stepbrother of Kimi Finster, and the major tritagonist (originally, deuteragonist before the introduction of Dil Pickles). In Rugrats in Paris, he is the main protagonist.
He is known for being an overall scaredy-cat of the group of babies, and whenever they decide to do something that Chuckie thinks isn't such a good idea, he tells them so, but they manage to persuade him anyway. Chuckie can be brave sometimes when he wants to, but usually has someone to back him up if it proves too hard. Susie Carmicheal once convinced him he was a big brave dog, while Angelica usually refers to him as a pure scaredy cat. Nonetheless, Chuckie still remains a faithful, loyal, and selfless young toddler and close friend of Tommy.
In All Grown Up!, Chuckie still isn't the bravest, but he's trying to take more risks. He still has his wild red hair, but his purple eyeglasses are more rectangular, and he has braces on his buck teeth.
|“||What Lillian means is... um... the monkeys kind of took baby Dil, and we just-- we thought you wouldn't mind a baby monkey instead.||„|
|~ Chuckie, The Rugrats Movie|