Conversation so far:
when do we find out garnet is a fusion
Viewers learn that Garnet is a fusion in the first-season finale, Jail Break, but foreshadowing in earlier episodes led many viewers to suspect it before it was revealed
what fusion was the character garnet a part of
Garnet is a fusion — i.e., two Gems combining personalities and appearances as one shared holographic body — formed by two Gems named Ruby and Sapphire.

Question: how was the relationship before the fusion
Self-contained rewrite: how was the relationship of ruby and saphire before the fusion of the character