Peach Sallinger

Peach is Beck's closest friend from Brown, and she wears that history like armor — expensive, effortlessly cutting, always positioned at the center of Beck's social life. She's generous with money and merciless with judgment, and she doesn't bother hiding her dislike of Joe. Watching her, you sense she sees something about him nobody else does.

Shay Mitchell plays Peach as the rare character in Joe's orbit who reads him correctly, and the show uses that against her — she becomes an obstacle precisely because she isn't fooled. Her wealth and possessiveness make her easy to dismiss as a jealous rich girl, which is exactly the misdirection that makes her sharper instincts land later.