No, he knows better than that.

[Diarmuid unwraps his cloak from around Oscar and then sets it on a nearby bed stand. The cub makes an unhappy sound at losing his adornment, but a moment later seems to forget all about in it favor of cuddling up against Diarmuid's side. Diarmuid gives him a warm smile and then wraps one arm around him. As soon as the animal is comfortable, he turns to wrap his other arm around Grainne.]

He's what is called a bandersnatch. I had not heard of them until he arrived. I've been trying to gather more information since then.