Shirin functions as a secondary antagonist across multiple franchise installments. Initially a member of the demon clan serving under Akram, she exhibits an obsessive, one-sided devotion to him, addressing him as "my lord" or "Master Akram," sparked by love at first sight. This fixation dictates her actions. During the first game's events, she aids Akram's ambitions to conquer Kyou, utilizing her shape-shifting abilities to infiltrate human society—frequently posing as a dancer to gather intelligence from nobles. She specifically targets the White Dragon Priestess Akane, attempting to steal the eastern talisman by disguising herself as a distressed woman. When her deception fails due to story inconsistencies, she shifts tactics, summoning the white tiger spirit to sow discord among Akane's guardians. After these failures, she flees upon realizing her perceived worthlessness to Akram. Her involvement culminates in the Black Dragon's summoning; her selfless wish to save Akram overpowers his destructive intent, inadvertently preserving Kyou. As a consequence, she unknowingly loses her free will to the Black Dragon, and both are transported 100 years into the future. In this new era, she becomes a shirabyoshi dancer favored by the Retired Emperor, acting as a mole to elevate the false priestess Chitose. Manipulated by the Black Dragon, she repeatedly curses the Retired Emperor's domain, summoning vengeful spirits to induce illnesses—only for Chitose to "exorcise" them temporarily, building Chitose's reputation. Shirin rationalizes this as serving Akram's goals, unaware he has abandoned such ambitions. When the true White Dragon Priestess Karin arrives, Shirin actively opposes her, controlling powerful vengeful spirits to attack her and her guardians, nearly killing Isato and Akifumi until Akram intervenes. His brief appearance reignites her zeal, though he simultaneously reports her movements to Karin. As Karin's powers strengthen, the Black Dragon's control over Shirin weakens. Karin attempts peace by revealing Akram's abandonment, but Shirin refuses to accept this truth and expends her remaining demonic energy in a desperate attack. Defeated and suffering backlash from her own curse, she is spared when Karin heals her and severs the Black Dragon's control. This mercy shocks Shirin, leading her to depart respectfully to forge a new, independent life. Her background includes brief spin-off appearances: she gloats over the demon clan's victory in Akram's dream sequence, confronts Tenma in a game adaptation, and curses Akane into a spirit-severing dream in another installment. In this dream scenario, she disguises herself among four priestesses competing for control of Akane's body but is exposed and expelled by the dream's Fujihime. Symbolically, her name references Persian tales of tragic romance (Khosrow and Shirin), mirroring her instant, unrequited devotion. Her outfits feature roses—crimson representing passion and longing, pink signifying entrusting her heart—reflecting her emotional arc. She wields rose vines and thorns in combat, channeling demonic powers. Personality-wise, she prides herself on mature beauty and belittles younger women, masking scorn for humanity beneath a charming facade. Her interactions with Takamichi reveal a unique dynamic, as he resists her seduction spells yet once saves her life despite her hostility. After liberation, she displays newfound gratitude and shares playful banter with Karin in an epilogue scenario, indicating her shift toward self-determination.