For those that played FE7 and Know of Astram, Harkin is basically Astram in that game, it’s uncanny.
If you don’t know who he is, it’s because Karel is gotten instead of him when you do or don’t fulfill an arbitrary task.
Both are blonde heroes with a Shield in their art. They are also enemies when you recruit them.
What an upgrade
Both have lovers who are blue haired Paladins, both of which can recruit the enemy Hero. (In Astram’s Case, it’s only Midia)
The problem is his weapon. He comes with a Brave sword. Unless they were to use the Wind sword, there are no weapons from Blazing Blade that would fit him (Rune Sword is for Jerme, if he ever gets in, though technically, Narcian already got the rune axe). Either way though, I’d build him. (Though they might pull a raven and give him an axe)
I would also like to have both Midia and Isadora in (though another lance knight sounds like pain)
Also, I’d like to see both pairs be in a wedding banner, where they recognize the uncanny resemblance.