Seraphina

Seraphina (who usually goes by Phin) is a quiet private school girl. 

She's top of the class for english and literature and is captain of the  fencing team. The rest of their time is taken up by writing poetry, participating in casual skeet shooting events, and having her friends round the house to have dinner with her and her father. 

Phin is studios, detail oriented, and growing increasingly tired of being stuck in the boundaries of high school, Rena and her are both itching to graduate. 

Their father is a Professor of Linguistics (Historical, with a focus on French) at a nearby University and the two get on well, though overall it's a rather quiet household.