(New Roles added) Fire Emblem Heroes Comic Fandub Series (Comic #15 onward)
Legendosaur for Robin
Voice Range: Medium, medium-low. Intelligent, calm, friendly (reference at timestamp 29:40: https://youtu.be/iB8ZWHhBmLY)
Robin is an enigmatic tactician that has lost his early memories, and starts life anew when Chrom finds him and accepts him into The Shepherds
In the 15th comic, Robin senses a sort of "bond" that Kiran and Alfonse may have, and tells this to Kiran, but doesn't specify what he means clearly, which leaves the often clueless Kiran to take it too literally.
(Robin, although unconfirmed, may appear in later comics)
(confiding)
"From what I've seen, Alfonse is your other half, huh? I sense the same type of bond that Chrom and I share in you two."
I fixed the link. I accidentally had "www" in it and that was a mistake. Thanks for pointing it out!