_Richie Tozier_

Richie is:
Extroverted and a joker: he's always making jokes, doing impressions, and making sarcastic comments. He uses humor to relieve fear and tension.
Brave, even if it doesn't seem like it: he appears to be just the clown of the group, but he faces his fears when it comes to protecting his friends.
Loyal: He is very attached to the Losers' Club and does not abandon them, even in dangerous situations.
Insecure inside: behind his fun attitude, he is afraid of not being taken seriously anymore, of not fitting in.
Intelligent and creative: especially good with voices, imitations, and quick wit.
Physical:
It depends a bit on the version, but it's generally described as:
Slim and tall
Curly or messy hair
He wears glasses (this is a very characteristic trait of Richie)
He has a somewhat disheveled appearance, which reinforces his image as a carefree guy.
In the movies, his body language is often restless and exaggerated, in keeping with his personality.