Lucifer

• At first, Lucifer doesn’t know what to think of Jack. He isn’t reckless like Mammon, overly flashy like Asmo, or unpredictable like Levi. Jack’s serious demeanor is refreshing, but…he’s still skeptical. What if it’s an act?
• What makes Lucifer soften toward Jack is his respect for you and all of them. Jack doesn’t falter under pressure, and Lucifer can admire a man who stands tall even when surrounded by demons.
• He still makes one thing very clear: If you hurt (y/n) in any way, there won’t be a Devildom deep enough for you to hide in.

Mammon

• “Wait, you’re tellin’ me this is (y/n)’s boyfriend?!”
• Mammon looks Jack up and down like he’s checking out a competitor at the races. He can’t decide if he’s unhappy, amused, or just confused. Why didn’t you tell him you were dating?
• He keeps asking Jack why he thinks he deserves you. But when Jack bluntly says, “Because I want to protect them and stay by their side,” Mammon freezes up. He wanted to make fun of him, but was impressed by the honest answer.
• From then on, Mammon is loud about “not trusting him,” but secretly, he respects Jack’s sincerity.

Leviathan

• Levi thinks Jack is way too normie. No gaming references, no anime comparisons, no interest in the latest merch. He looks like the kind of guy who’d scold him for staying up all night binging a show.
• But when Jack admits he struggles with opening up to others, too and prefers to rely on his own strength, Levi kind of gets it. He can see bits of himself in Jack, even if their hobbies don’t line up.
• Levi still keeps his distance. If you’re happy, he’ll support you, but don’t expect him to invite Jack to an anime marathon.

Satan

• Initially, Satan sizes Jack up. He notes the way Jack watches his surroundings, his protective stance near you, and his sharp responses. He isn’t weak, and Satan is relieved.
• But Satan also senses Jack’s impatience and occasional brashness. He’s worried that if Jack’s temper ever snapped in the wrong place, things could escalate quickly. But then he sees the way Jack cares about you.
• Satan decides to trust Jack, but only as long as he proves he can control himself. If Jack ever lashes out at you, Satan will be the first to intervene.

Asmodeus

• “Oh my~! He’s adorable! Look at those ears, that tail, and that rugged, wild charm!” Asmo squeals over Jack like he’s some kind of puppy.
• He wants to pet him, braid his fur, and give him a skincare routine, all in one sitting. Jack is horrified and doesn’t know how to handle Asmo’s energy.
• Once Asmo realizes Jack is stubborn and not interested in pampering, he pouts but still supports your relationship. If Jack truly loves you, then he’ll back him up, but don’t expect him to stop squealing over how “cute” the wolf is. Not to mention those ears! Asmo will touch them one day.

Beelzebub

• Beel’s first thought is if Jack strong enough to protect you? Protecting family is important.
• After watching Jack train, Beel is relieved. Jack is disciplined and constantly trying to get stronger. That resonates with Beel, who knows the importance of physical power.
• The two of them end up respecting each other. When you’re not spending time with Jack, he and Beel are probably together in the gym, spotting each other while lifting weights.

Belphegor

• Belphie is one of the harder ones to win over. From the moment he meets Jack, he’s glaring at him with thinly veiled hostility. “So you’re the one dating (y/n)? Hmph.”
• Belphie thinks Jack is too naïve. He’s worried the wolf is too overconfident in certain matters. And even when Jack shows he’s strong, the youngest brother won’t trust him with someone as important as you.
• It will take time, but if Jack consistently proves himself, Belphie will ease up. Until that time, he refuses to let down his guard.