Seneca here frequents the library a lot and she'd really like Persephone! She might give off a "she's a snobby Lestrange" vibe at first, but she'd like and respect her because she loves studying.

Then I have Sen's cousin Meta Lestrange who's fiery and a trouble-maker, so we could have a fun thread where she makes some mess in the library?

Lastly, Ruby Urquart is the daughter of the former Minister of magic and her sister is a werewolf. She's not very studious generally, but she's passionate about Divination. Persephone has probably found her crying about some subject she found difficult once or twice. xD