At first Lureus was just interested in Poe's weird mutation issues, since they were tons of fun to watch and play with! But as they spent more time together, Lureus found himself enjoying Poe's presence even without any bloodshed about. He'll instantly obey just about any command of Poe's - his loyalty running even deeper than his loyalty to Ignis - even if he doesn't always understand why Poe's insisting it's not okay to chew on this or cleave that in half.
Most importantly of all, though, Poe is nigh-unrivaled petter with mastery of head scritches. That's important to him!
Lureus seems an odd sort for Poe to be so close to, and in truth Poe would agree. But Lureus hung around him when Poe was at his worst, physically speaking, and Poe finds his presence oddly comforting. He appreciates that Lureus is so cooperative, though it's not like Poe isn't used to how Hell College's residents work by now. Still, he feels like it brings more meaning into their relationship, that Lureus cares about him enough to betray his natural instincts and upbringing to keep him happy.
While his impulsiveness and rash energy leave something to be desired, Lureus at least is an example of a decent wrath demon. Powerful, boundless potential, and unhesitating to take advantage of both of those traits. With a bit of polishing he could be something special, but under Ignis' tutelage that's doubtful.
Jing's a good teacher and all that, but Lureus still has trouble grasping the merits of Not killing people you fight. If they just respawn later, what's the big deal? Not like you're risking losing a playmate!
Lureus is... difficult for him to manage. There's quite a bit of violent energy to reel in, even for a Hell College student. Still, in some ways he's easier than others, and as time went on he became easier to teach. Seems Poe was a good influence on him...
Ignis better tighten that leash, because Lureus is hilariously easy to get confidential information out of. Seems Ignis learned to stop letting Lureus know anything important pretty quick, at least, but Ignis isn't the only person on campus Lureus knows...
Ohhhhhh kitty!! Pet pet pet!!
Probably completely unaware that Lureus is An Actual Person, because much like how she coincidentally never sees Ignis do anything evil she coincidentally never sees him in anything other than cat form.
Lureus sure has a ton of energy! She can't help but approve, although he's not actually the best sparring partner around. He's a little... vicious. Not too much respect for the sport, y'know? Too excited for his own good.
Hal wasn't sure how to feel about Lureus at first. He's got the look of some boring self-superior dickwad who doesn't know how to have fun, after all... but it turns out, he's the opposite! Uniting the worlds of cats and dogs forevermore, the two get along just fine.
Dicro is just the best! He reminds Lureus a lot of Poe! He's not quite the same for some reason, but it's hard to resist a guy who loves cats and dying! If only they were around each other more... when's Dicro going to become an Infernal? Isn't he already buddy-buddy with Ignis already? They could have so much fun together!
Dicro is familiar with most of the Infernals, and Lureus is no exception. In fact, Lureus is one of the most prominent in Dicro's mind. He's hot, he's a catboy, he can turn into an actual cat, he's full of bloodlust and drama-free... he meets all of his standards!!
It's terrible, because he could go for it and it would be just the best, but Ignis would never let him hear the end of it.
Lureus loves Chaurus! It's always entertaining when Chaurus tries to hold Lureus back from things, and he always likes seeing what Chaurus is truly capable of on the battlefield. Not to mention that with Chaurus' healing aid Lureus is pretty much unstoppable. They make a good team! And though Chaurus might not admit it, he's pretty good at the whole petting thing.
Their side of the triangle isn't quite as strong and they're mostly just here for Poe, but it's not like Chaurus doesn't like Lureus or anything. He's just a lot to handle. A LOT to handle. But, y'know, for some reason he can't help but like that about him. It's fun to have to reign someone in sometimes, and Lureus' boundless energy helps Chaurus remember to have a little fun now and then. It helps that Poe's had great success in mellowing out Lureus as well, so it makes Chaurus think there's not too shabby a fellow underneath all that blood and frenzy.
Ignis is just the best! Always gives him plenty of things to eviscerate, and now he's got tons of fun co-workers to train with! Lureus doesn't regret offering up his soul to Ignis in the slightest; his family probably isn't too happy about the sacrilegious act of sharing his soul with someone other than Nyarlathotep, but hey, the ol' cat hasn't come knocking yet! And he could probably take Nyarlathotep at this point with everything he's learned from Ignis, anyway. Point is, cult leadership is booooring, and he'd much rather be in the service of someone fun than being at the top of the chain preaching all day or whatever.