I like to think he would be a tsundere since he doesn't seem to mind the herbalist having relationships with other people he kinda seems to like it. The thing is just that he's way too into power play
yeah that makes the most sense, yandere would also be mainly for fun i'd think. because imagine him trying literally anything and failing cause the herbalist whoops his ass lmao. tsundere is also proven to be something EVERYONE here likes...