Thanks! :) The game already has 17 main girls and they're a LOT of work (Five love events, five story events, dates, and so on) so I won't be adding anyone else into that list, sorry!
That being said, Claire is going to occupy a position somewhere between main girl and side girl. She wont have the stats and sheer number of events as a main girl, but she'll have a lot more than any other side girl. So hopefully that eases the disappointment somewhat! ;)