Considering how broken this game is to begin with, I don't see this being a bad thing.
It just feels like something the game would do.
No, in the actual game, only the original fight where Gau uses Leap command, and the fight he returns in count. Everything in between is a waste of time for learning Rages.Wait, does this actually happen? I thought party fought battles counted... Curious!Beast's Eye - Allows Gau to learn Rages from party members battles on the Veldt.*
*Basically Gau only learns the skills of monster in battles where he Leaps and when he returns. This relic will allow him to pick up rages of enemies your party fights while waiting for him to return. Gau must be using Leap in the Veldt and it only applies to monsters fought on the Veldt.