Leah Birch

Leah Birch is a supporting character in Big Mouth. She is the only daughter of Elliot Birch and Diane Birch, the younger sister of Judd Birch and the older sister of Nick Birch. In the second series, she walks in on Andrew Glouberman masturbating to her swimsuit.

Appearance
Leah is a Caucasian teenage girl with hip-length blonde hair that is styled on either side with a butterfly clip in that has a magenta body and tangerine wings on the right side of her head, sky blue eyes, blonde eyebrows and lemonade lips.

She wears a white sleeveless crop top, a vibrant violet skirt that has a Tiffany blue trim with a chartreuse skirt underneath her violet skirt, cerise sandals, a golden necklace, a golden belly button piercing, three golden bracelets on the right side of her wrist and a golden ring on her right index finger.

Personality
Leah is a polite and kind-hearted teenage girl who is friendly with everyone. However, if she is disrespected enough by someone, she will stop being nice and start being mean, as seen in "The Head Push", when Daniel forced her to give him a blowjob and she responded by putting his beanie full of "Cotton Candy Brandy" vomit on his head, showing him up in front of the entire party and slashing his tires. She is nice to Nick Birch who doesn't have a problem with explaining girls to him, even if that kind of stuff gets kind of sexual, as seen in "Girls Are Horny Too", when she explained what makes girls horny and in "What Is It About Boobs?", when she and Diane Birch told Nick and Andrew Glouberman that girls can appreciate each other's boobs in a non-sexual way.