This braid guy is such a little bitch, it's annoying. I'm 90% sure he is jealous that Al has a sub, and the remaining 10% is just him being a natural asshole with no real motivation. But probably it's a combination of both.
He cannot seriously be concerned about Al's free time, wellbeing and workload (even if he complains that extra work will fall on him in case something happens to Al), when it's common sense that doms need a partner to do plays with, and I doubt that the bitch doesn't know that Al didn't exactly have one in a while. So Zen is basically the key to his health, both mental and physical. The bitch *has* to know it. If anything, he will have extra work if Al continues to not have a partner and falls apart.
Not to mention, that his casual cruelty towards Zen the first time they met doesn't speak well of his personality, and this time too, he didn't hesitate to deliberately throw around words, that he knows, have harmed Zen the last time, as evidenced by his surprise over Zen not reacting this time. He knows exactly what he is doing, and feels zero guilt. It also looks like he is about to cause Zen to sub drop, and I bet he won't be apologetic about that.
Anyway, the bitch clearly knows, that he will cause great harm to Al if he manages to separate them, it's such common sense in their world that it's almost undoubtedly his goal (unless he wants to pair up Al with some other sub or whatever contrived reason). Yet at the same time he does not aproach Al, and attacks him through a vulnerable person. Which makes me think that the bitch is afraid of Al, since he could intimidate even doms easily. These two facts make me think that he is actually jealous of Al - jealous that Al is so much stronger than him. Or perhaps he also thinks that Al is "defective" and doesn't deserve to have a sub. Either way, a pathetic bitch.