Any squabbles or dust-ups? They look pretty relaxed!
Nope, no problems that I've seen.
In picture 5 I'm sitting on the storage box opposite Glais. I could have easily reached across and touched him. Initially he stayed standing up when I sought shelter from the rain. Mow and Sylph are used to me sitting there. If Glais doesn't detect any stress signals from them he is less likely to get stressed himself.
As I came and went while they were on the extension roost bar Glais stopped standing on my arrival.
I've been making sure that I just go about my business with calm measured movements. I don't position myself between him and the hens if I can help it and I don't encourage Mow and Sylph to come to me.
I've stopped hand feeding treats to Mow and Sylph; which interestingly has bothered Mow who did come up to me at one point and peck at my boot a couple of times. I just moved away.
I did give them treat food today ( steak

) which I spread out on the ground in three areas so that they all got a chance to get some. That worked okay. Nobody bullied anyone away from their area, although Glais made sure he inspected every possibility once Mow and Sylph had finished.
My impression of Glais so far is he's a rather intelligent and well balanced creature, particulalry given his age. He'll move out of my way but there are no signs of him being scared of me. That's about ideal in my view.
He's working on making friends with Mow. She'll be quite difficult to win over. He's doing okay on that front as far as I can see. He tried one half hearted chest bump with Mow but she knew what he wanted before he made contact and moved away. Glais didn't push the matter and seconds later they both had their beaks in the same digging patch.
I think if I'm calm, confident and considerate, he'll be the same, something I've found to be true with most other species. Shame humans are not as reasonable in general.