Leon was comfortably raised by both parents in a calm village. Because of his effeminate looks, he was often bullied, and became stronger through challenging such people to duels to prove himself.
A former soldier, Leon reluctantly joined the Zofian army when an unnamed man, whom Leon had long held a love for, enlisted. Said man died in battle, and Leon entered a state of depression. However, due to his companion Valbar's encouragement and kind words, he got back on his feet and has been attached to him ever since. After Barth is defeated, he joins Celica's party.
After the war, he joins the knighthood of the newly formed kingdom of Valentia, continuing to working alongside Valbar. In the remake, Leon retires to open a shop, but remains in contact with Valbar. If Valbar dies, however, he remains in the military and becomes an instructor.