In my (limited) experience with only a few Favorelles, the breed as a rule is very mild mannered, and our Favorelle roosters were also very mild mannered. Our RIR hens, on the other hand, were pushy feather pecking individuals, often not so nice to their flockmates. Your boy may take a bit longer to fully integrate into this group if that's how your individual birds behave. Everyone is still very immature, so he has time to grow up and when he hits puberty things may go his way...
Mary
Mary