...I also have no idea why people find him cute?? Whether looks or personality.
He's been going around chasing after a woman he's barely talked to while he's still engaged, and now he's just kind of in the way of the quest (lll><)a... he's so pushy and brutish, and even Lili is like "---ok, but why are you here??? the cliff thing happened ages ago". I feel bad for his fiancee who isn't even a bad girl, she just has a bad brother.
He was indifferent to his fiancee, but they were known by all of high society to be getting engaged since the very beginning (ch 2). Their families would've had to originally agree for it to even be a thing. Female Lili and the duke met because he was visiting his fiancee. The fact that he hasn't cleaned up his social mess and is chasing around another girl aimlessly while still engaged makes him no better than those trashy men in Villainess stories who forsake the person they're officially with for another girl. Noble society is all about pride and procedure, he could easily ruin the fiancee's standing, and so far she's done nothing to deserve that.
duke is ugly asf idk what yall on about