In Breath of Fire III the player first meets him when Balio and Sunder capture Ryu while in dragon form in hopes of getting some sort of reward. To their dismay, when they uncover the cage Ryu has reverted back to his human form, and the King sees them as con artists and has all 3 placed in the prison. After Balio and Sunder capture Nina, Ryu saves her and once you finish the entire chain of events that lead to Balio and Sunder's death, you return to the King to get a passport to cross into the Rhapala Region. After Nina escapes the castle with Honey, the King and Queen believe Ryu and the rest of your party to have abducted her.
In the second half of the game, after taking care of Palet at the The Plant, Nina returns to the castle with Rei who was not present at the events in the first half of the game involving Nina, so the King does not immediately know his involvement with Ryu. They secure a new passport to the Rhapala Region from him since the first one was now expired.