A knight of the Fronenberg and deemed the best swordsman in the kingdom, Jais is an orphan and strives to save orphans like himself, but the kingdom has continued to fall into disorder despite his best efforts. In all three endings, he is the only character who actually survives, but he is confronted and killed by Allura if she decides to retreat. In the good ending, Jais helps Allura escape Malphas' mansion and goes to search for survivors, only to have a demon sneak up on him. His fate afterwards remains uncertain.
Jais' voice actor, Nobuyuki Hiyama, is well known for his roles as Hiei from Yu Yu Hakusho, Link from Legend of Zelda: Ocarina of Time, and Date Masamune and Fūma Kotarō from the Samurai Warriors franchise.