it would be nice if we could make Kagha an ally of Minthara in this route.
Or leave her friendly and neutral.
For that to happen Kagha and Olodan should not be an outside hostile party. We don't know for sure if they will become relevant again later but the druid storyline seems rather done and dusted post Act 1A, so we might not even find out on whose behalf Olodan was acting. (other than the shadow druid from BG2 who is mentioned in a lore note)