Reinhardt is an enemy character from Fire Emblem: Thracia 776. Said to be the second coming of the Crusader Thrud, he is the leader of the Gelben Ritter in the Friege army and has been Ishtar's personal guardian since childhood. He is also the older brother of Olwen, who initially admires him. Kempf despises him out of envy and views him as a rival.
(Source: Fire Emblem Wikia)