Gawain is the father of the protagonists Shion and Marie, serving as the head of the minor noble Ornstein family that governs their local region. He is a trusted and respected figure within the community, with the villagers placing deep confidence in him, which helps to create a sense of security throughout the area. His reputation is built on a foundation of high integrity and a strong sense of responsibility that comes with his position.

In addition to his duties as a lord, Gawain is a highly skilled swordsman. His excellent combat ability and honorable conduct have earned him the respect of many people who know him. This martial skill proves crucial at several points in the story, such as when goblins are sighted near the village and he takes the lead in hunting the monsters to protect his family and populace.

Through his role as a father, Gawain is a key figure in the lives of his children. The story is set in motion when his son, Shion, asks him about the existence of something called "magic," a concept that is unknown in their world. His role within the narrative is that of the responsible patriarch and protector, whose governance and actions provide the immediate context for the main characters' upbringing and their subsequent adventures to uncover the secrets of magic.