Sunshine: It'd take the Sorting Hat a long time to choose between Hufflepuff and Gryffindor for her, but would ultimately go with Gryffindor, much to her consternation.

Yrael: Ravenclaw. Too clever and curious for his own good, without any real ambitions except what spurs his curiosity further.

Zelgadiss: Ravenclaw also, because he is, at heart, a geek. He loves being clever.