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Margo is on Lynn's baseball team. On their way to the game, the team stops at Flip's Food & Fuel to get some snacks, which Clyde provides for them. However, Margo has to go to the bathroom, but Lynn tells her to hold it, stating that if they go number two, they won't be number one. After the game, she finally gets to go to the bathroom, and leaves a big mess behind that Flip has to clean up.
In "Lock 'n' Loud", it's revealed that she's also on Lynn's roller derby team.
In "Friend or Faux?", she is seen practicing hockey with Lynn.
In "Friendzy", Lynn invites her over in order to use special friend privileges.
In "A Pimple Plan", Lynn mentions that she has an older cousin.
Margo is a sporty girl, and a friend of Lynn's. She is close to her, as she agreed to help her in protecting her house from burglars. She gets worried by Lynn's superstitions, and because of this, she was forbidden to use the bathroom.
In "Hero Today, Gone Tomorrow", she also cannot stand Lynn's ego has gone too far, despite this, she fairly let her do whatever she wanted and doesn't mind saying she didn't warned her.
Margo has long, light brown hair (styled like Leni's), buck teeth, and freckles. She wears a red baseball uniform, a red baseball cap, with a white front, white socks, and white sports shoes.
In "Hero Today, Gone Tomorrow", she wore a yellow T-shirt, light blue jeans, and dark teal slip on shoes.