Baz Pitch, Ravenclaw: playing the violin, wanting good grades, clever mind, sharp-tongue, speaking four languages, worrying about class, wanting to come back to school (over and over), wanting an education.
Simon Snow, Hufflepuff: shielding the people next to him from his own magic, loyalty, doing his best every single time. fierce and dangerous in a fight, forgiving, stubborn, trying to do what's right.
Penny Bunce, Gryffindor: reckless, headstrong, getting good grades but not really caring about them, loving her friends, knowing what's right, fighting for causes, seeking danger, an adrenaline rush kinda person.
Agatha Wellbelove, Slytherin: taking care of herself, running away, seeking happiness where she can find it, stealing a dog, discontentment, refusing to be shelved, taking what's hers, finding her place.