Leanne Clearwater (daydreaming) is a 5th year Ravenclaw. She's introspective and off in her own world half of the time, shy and quiet, and aspires to become a fashion designer.
Audrey (yes, that Audrey) Bulstrode (audrey_elise) is a 6th year Slytherin and prefect. Audrey is ladylike, a good student, and tries her best to be friendly and outgoing, as she knows people skills and charisma are important in politics, which she plans on going into after Hogwarts.
And last but not least is Alexandra Volakis (this journal), 7th year Durmstrang student! Alexandra is from Greece. She wants to become a healer, which stems from the fact that she likes helping people. She's very people-oriented, a good listener, and an avid reader.
Audrey and Alexandra might sort of know of her from clubs (Audrey's in choir and Alexandra's in flying club), but Leanne is likely to know her best, being in the same year. She's also pro-Cedric/anti-Potter, so they have that in common.