If it wasn't for her inheriting her dad's whole personality, she would've been in Hufflepuff. Cassie 'Alex' Lupin is an exact replica of her father, Remus. The similarities in the things (and her people) they liked and their actions were unbelievable. Not one of her friends had ever met Remus until her fifth year when he became a Professor. This seemed to start off a series of unexplainable (not exactly unfortunate) evens, especially with her father's 'boyfriend' on the loose.