I mean I would also like C.C in the harem but then again I did ship LelouchXC.C
C.C is one of my personal favorites waifus and since when I read I see myself as the mc I much rather her be with him
I think so but you will have to fix the problem that both of them have, one does not know what love is but it is known that she has feelings for Jellal and the other is traumatized by the death of her lover.