Quote Originally Posted by Future Esthar View Post
He is Vaan Solidor,elder brother of Reks Solidor and heir to the throne of Arcadia.But since he became amnesic along with Reks and Vayne was rejected,the younger brother Larsa became emperor.
The game uncategorically states that there were 4 male sons of the Emperor. There were two unnamed brothers, both older than Vayne, Vayne himself, and Larsa. Seeing that both Reks and Vaan are both younger than Vayne, this means that the point you have just raised has no substance, as it flies against the facts provided within the game.