I think that makes sense. Zun sounds like he has a very good companion for him.

[Zuko is the first person to really say anything about familiars the way she might be inclined to do so. She hasn't called her drake family yet, but it's been a thought in the back of her mind.]

I'm not sure how many would consider their familiars family, but I think that's an important relationship to establish. We were given these familiars for a reason, after all.