“Gambling's what I live for. Even when I lose, I never want to stop.” — Joshua to Natasha.
Joshua (Japanese: ヨシュア Jhosua) is the wayward prince of Jehanna, a desert country on the eastern edge of Magvel. He first appears in Chapter 5 of Fire Emblem: The Sacred Stones, in which he is hired as a mercenary by Grado sent to kill Natasha. If Natasha survives, she can speak with Joshua and end up recruiting him.
Joshua's behavior makes it obvious that he is a gambler, deciding his fate with a flip of the coin. He enjoys spending time in arenas as well. Joshua also mentions to Natasha in a support conversation that he may appear cynical.
(Source: Fire Emblem Wiki)
