Eriol and Spinel Sun
Eriol and Spinel seem to be on serious terms, understandable since they're both the quite type. Spinel and Eriol seem to be the real masterminds, Ruby moon just skips around and tries to steal Touya from Yukito (she should keep her grubby hands off To-ya-kun. He DOES like Yuki after all *_-).
Eriol and Spinel seem to be on good terms and Spinel is very faithful to his master.