Hearth cares about Blue a lot. Even though they're the same age, he looks at Blue kind of like he looks at his kid. He can tell he's kind of a bully which makes him wary, but he also knows that he's a good guy deep down and that his bullying behavior comes from insecurity. That doesn't mean he's going to put up with his bullshit when it comes down to it, though. He also likes to fuck with him and rolls his eyes a little bit at how sensitive Blue can be, but overall he thinks he's a good guy and he's one of the fam now.