beta
I'm not sure and this probably won't make any sense, but it's better than not expecting anything at all. Baro is a waste of a character, the plot is slow phased and for baro's well built character, it would hurt the story to lose him.
Just a hunch (I'm not sure okay don't judge me I'm just spitting random things now I know).
I think baro haven't switched side yet, cause if he is an actual villain he will appear more in front of the mc's which if he did, it will hinder his operations/plan. He seems to be acting alone so if he openly shows himself to either caius or koichi, they would either save him or get him a grip somethin like that. Also, when baro approached koichi he might be trying to tell something about the egg?? Cause he's already in the group, he might have found something out. I hope he's not a villain tho, I'm gettin bored with this #－.－)