Fate/kaleid liner Prisma☆Illya: Vow in the Snow

A high school student who becomes the emotional core of the story, forming a protective bond with Miyu while confronting the looming threat. He leans into his growing resolve and uses his Archer Card-powered abilities to face enemies. His journey centers on whether he can safeguard Miyu without losing his humanity.

Shirou's adoptive father, a pragmatic mage who views Miyu's power as a potential tool to save humanity. His utilitarian mindset creates a moral tension that haunts Shirou. He dies before mastering Miyu's abilities, leaving a lasting impact on Shirou's choices.

A girl with the power to grant wishes unconditionally, whose existence triggers the conflict surrounding the Grail War. She is both a coveted asset and a beacon of hope for happiness, though her fate is tied to the choices others make about her future.

Shirou's ally who offers support and loyalty, helping him navigate the escalating danger. Her courage is tested as she confronts the darker sides of mage politics and personal risk. Her involvement underscores the human cost of the Grail War.

A local priest who guides Shirou through mage politics and unveils the deeper conspiracy surrounding the Ainsworth family. He acts as a calculating observer with ambiguous motives, shaping the path of the conflict.

Shirou's classmate who grounds the story in everyday life while providing a glimpse of the normal world amid magical upheaval. She represents the ordinary life that persists alongside extraordinary power.

A member of the Einzbern lineage who participates in the magical framework of the Grail War, adding complexity to the magical hierarchy and its interpersonal dynamics.

A magical being tied to the world of wishes, whose presence enriches the mythic layer of the story and interacts with Miyu's powers.

A companion magical entity that complements Ruby within the magical network behind Miyu's abilities, participating in the rituals and aiding the plot toward its climax.