Rin Tohsaka monitors Illya’s efforts to gather Class Cards with the Kaleidostick Ruby, a mission complicated when Ruby defects to Illya after Rin’s feud with rival magus Luvia Edelfelt escalates. In this continuity, her lineage avoided the Holy Grail War, and she entered the Mage’s Association under Kischur Zelretch Schweinorg’s guidance post-middle school. Though her sister Sakura was adopted by the Matou family, Rin’s lingering guilt resurfaces when encountering alternate versions of Sakura across realities. Resourceful yet emotionally guarded, Rin balances competitiveness with vulnerability, particularly around Sakura. She openly pursues a romance with Shirou Emiya, diverging from her more restrained counterparts, and clashes theatrically with Luvia over their shared affection, generating chaos that erodes Illya and Miyu’s faith in their leadership. Financial strain drives her to accept lucrative assignments, sometimes at the cost of her dignity. Tasked with securing Class Cards alongside Illya and Miyu, she confronts anomalies like an eighth Archer card tied to Gilgamesh and the Ainsworths’ cross-dimensional machinations. Temporarily ensnared by the Ainsworths’ brainwashing, she breaks free with Gilgamesh and Bazett’s aid, rejoining the battle against their forces. In critical moments, she stabilizes a gravely wounded Shirou using her pendant’s healing magic and challenges alternate Sakuras to embrace their sisterhood. Her arsenal includes Gandr curses, restorative magic, and the jewel-powered Thor’s Hammer ritual to amplify allies’ strikes. She wields the Azoth Sword and retaliates against Luvia with Shared-Pain curses, though their squabbles frequently hinder strategic coherence. Her journey intertwines duty with personal bonds, navigating moral ambiguities in the Ainsworth conflict and alternate realities, ultimately cementing her commitment to safeguard her loved ones.