Responses
He can't be of same age as the prince because precisely as you say, he is a baby dragon. The only thing I can think of is that because the goddess granted him that (not quite his own wish) ability to be removed from his physical body he can then take on any physical shape perform. Ofc, he probably is most comfortable in his own (previous) skin, so to speak. And has experience w it. Unless he Really wants to become like a troll or something. Hahah
Its got an interesting premise and I like that the Prince is clearly not an omega and actually quite devious. Idk how to feel about Inferna transforming into a fully grown man tho. I know technically he was an adult when he died but considering he was reborn as baby dragon anyway, I feel like it would have made more sense to have him sort of age with the prince :/