Ohhh, this is a fun one! Thank you, Oya!
See, Finn doesn't really find Malleus that intimidating at all. He's not an idiot, he's well aware Malleus is a prince that holds magical power far beyond his own, but when you're continually haunted by ghost babies and suffer from night terrors and you live in the Coral Sea and your father is a butcher with some questionable connections, it's difficult to be intimidated by much.
That aside, Finn respects Malleus and enjoys his company. He finds Malleus' general nature quite entertaining and his protective nature over him (and Yuu) quite amusing, endearing even. He would like to learn from Malleus, whether or be Malleus' culture or spells or other things. Malleus is the closest thing Finn has to a friend, though Finn would rather drop dead than admit to being fond of the idea.
Malleus, on the other hand, loves Finn. Finn does not fear him. Finn does not flinch when he comes near. In fact, Finn is remarkably unflinching. Finn is his friend, like Yuu, and is therefore very dear to him.
Malleus is protective, not to a possessive degree, but he is perfectly willing to strike anyone who brings Finn harm. (This causes a debacle when Finn is injured during Azul's overblot)
Malleus enjoys his time with Finn, and it makes him happy that Finn has such a keen interest in gargoyles. It was nice to have someone to talk about his interests with, someone who actually engages.
Malleus himself has started learning about abyssal magic from Finn. It was amazing, really, learning something no one else could teach him. Finn is an odd person, but Malleus finds that endearing. Finn's paintings fascinate him, and he's hoping to convince Finn to paint a gargoyle, even if the shark is insistent that it won't look good.
Finn is someone who he can either have pleasant conversations with or simply sit in silence with, and it's a nice combination.
Malleus can sense those ghosts constantly hovering around Finn, even if he can't see them. He isn't sure how to proceed when it comes to them, as the first time he asked about them went....poorly.
All in all, they're friends, even if Finn won't admit it, and they get along well. They're getting closer over time, though it's a slow process. They're a cute duo.
Finn hates Crowley with a passion and finds him extremely suspicious. They don't interact much, and Finn avoids hum like the plague. He's so obnoxious and loud, and Azul has dirt on him, so that's an instant red flag.
Crowley is honestly creeped out by Finn, but he's a well-behaved student (mostly), and his paintings of the various school locations provide good advertising material. He can't help but wonder why Finn's stellar grades are steadily dropping, but it's none of his business, so nevermind that! He is curious about the souls that are attached to Finn, according to the Dark Mirror, and he thinks Sam knows something about it. He'll have to go interrogate the shopkeeper sometime...
Okay I accidentally added a poll so:
Are those who read it excited for my next Silas fic chapter?
Final result from 13 votes
(You're not allowed to say no/j)