Would you like to talk to my girlfriend who is 30 years old, married to her 2 years older husband, blessed with 2 children, but, she is a carbon copy of Rurin, minus the childish act.
I have seen you say this a few times in her and honestly no hahaha cuz if she doesn't act like a child I don't see the problem. Her the dragon is explicitly acting like a child, her actions, feelings and even her dragon age is of a child, the mc always treated her like a child he had to take care of, that's weird and off, if the author wanted her to be a live interest they could have made her at least a little more mature and independent in her ways but she is just a kid who drinks beer honestly
Dang the romance between the ml and dragon is so wrong. If the author wanted to insist it, they could have just made the dragon into a young adult form at least and just assume that they're still young despite the appearance.