Grace Martilas is a character from the anime The Too-Perfect Saint: Tossed Aside by My Fiancé and Sold To Another Kingdom. She is a saint from the Kingdom of Bolmeln and holds the position of the fourth daughter of the Martilas family, a noble house known for its long tradition of producing saints with sacred powers.

In terms of personality, Grace is characterized by a deep sense of admiration and a strong enthusiasm for learning. She is not content to rely solely on her family's inherited abilities; instead, she actively seeks to improve her skills. Her primary motivation is to master the Sacred Banishment Arts, and to achieve this goal, she travels to the Kingdom of Parnacorta. Her journey is driven by a desire to learn directly from Philia Adenauer, a figure she holds in the highest esteem.

Grace's role in the story is intrinsically linked to her relationship with Philia Adenauer. She is portrayed as a devoted admirer and a dedicated student of Philia. The depth of her respect is demonstrated by her reverence for Philia's written work, Saint's Theory, which she regards as her personal bible and uses as a source of constant inspiration. This admiration shapes her character, as she sees Philia not only as an idol but as a clear example of the kind of capable and powerful saint she aspires to become. Her visit to Parnacorta is specifically to receive tutelage from Philia, highlighting her proactive nature in pursuing her own development.

Regarding her development and notable abilities, Grace is already a saint from a powerful lineage, but the narrative suggests that her potential is amplified by her willingness to learn. Her notable ability is her focus on the Sacred Banishment Arts, which she seeks to refine through Philia's guidance. The character is defined by her journey from being a talented scion of the Martilas family to a deliberate practitioner seeking to elevate her skills under the instruction of a figure she deeply respects.