Since I play in Japanese without understanding the dialogues (really a shame because the Japanese dubbers seem to be the best in the world), I only have portraits and 3D modeling to get an idea of the characters.
And for me, it seems obvious that Deen is hands down the dopest looking character in the game.
Without him, I would have struggled to find a favorite character in this game.
I discovered the Fire Emblem saga with Awakening and my favorite male characters are Owain / Odin and Saizo but Deen definitely put the bar higher in terms of character design.