Kyle is a playable character in Fire Emblem: The Sacred Stones; he is an intensely loyal and intelligent young knight. He is very devoted to Ephraim and is a fierce rival, yet also best friend to Forde. Their rivalry seemingly started out from a tournament, in which he was defeated by Forde, which made him start focusing on his training to never lose to him again.
Very chivalrous and proper, Kyle is a classic knight much like Kent from Fire Emblem: The Blazing Blade. His devotion to his status as a knight has him come off as a little too serious for some, although he learns to loosen up during conversations with Forde and Syrene. After the war ended he became a battalion commander for Renais, and is able to marry either Syrene or Lute in his support endings.
In his B support conversation with Forde, it is revealed that Kyle has a sister named Mia, who married into a well-off Frelian family. In his A support with Syrene it is learned that when she gave him a carved figurine of a pegasus knight he started to collect wooden figurines. This is also mentioned in his A support with Lute.