Robin is a Grandmaster who has great knowledge of fighting battles and serves as the vigilantes’ tactician. Leading Chrom and the Shepherds through a long campaign to protect Ylisse from the Plegia, Robin became Chrom’s trusted advisor for war and ultimately led to Chrom’s victory over Gangrel. In the original timeline, after Robin and Chrom defeated Validar at the Dragon’s Table, Robin became possessed by Grima and killed Chrom. His conscience was completely taken over by Grima, who used their life force to reawaken his dragon form. When Lucina attempted to escape to the past, Grima followed her in the now dead future Robin’s body. Upon returning to the present, Grima tried to fill the present Robin with his memories; however, Robin’s Heart of Grima wasn't strong enough to retain the memories, and this resulted in Robin’s amnesia. However, Robin is occasionally flashed with their future version’s memories from time to time, resulting in migraines. Robin and the Shepards won the war that had him struggled and he is married to Lucina, who is Chrom’s daughter.

Sound like his voice in Smash Bros. and FE: Awakening as best as possible.