As a heroic spirit, she suppresses most original power to pursue becoming a "good wife." Appearing as a humanoid fox therianthrope with pink hair, fox ears, and a tail, often in a blue witch's robe, her personality blends playful charm with melancholy. She presents as cheerful and devoted, wife-obsessed towards masters deemed morally worthy, yet past betrayals fuel cautiousness and jealousy. Anger triggers vulgar, confrontational speech. This duality stems from her tragic human experience—desiring connection but facing persecution. Combat capabilities scale with tails. As an eight-tailed Servant, she wields witchcraft for support and disruption: draining enemy Noble Phantasm gauges with high reliability, boosting allies' Arts performance and Noble Phantasm damage, and healing. Her Noble Phantasm, "Eightfold Blessing of Amaterasu," reduces skill cooldowns, heals allies, and charges their Noble Phantasm gauges. Restoring nine tails grants godlike powers like faster-than-light travel and time reversal, but she avoids this state due to its association with her past. Shapeshift abilities exist but see little use due to trauma linked to her exposure and death. Her development emphasizes redemption through servitude. In Fate/EXTRA and sequels, her bond with master Hakuno Kishinami deepens her devotion, culminating in using her nine-tailed form to protect Hakuno in the Moon Cell Holy Grail War. In Fate/Grand Order, she supports as an Arts specialist, leveraging cooldown reduction and healing for sustained strategies. Interludes and rank-up quests refine skills, enhancing "Fox's Wedding" to include healing and "Curse" to boost team Noble Phantasm damage, underscoring her commitment to atonement while balancing divine legacy with self-imposed mortal limitations.