Jaswant, adopted son and agent of Sindhura's Grand Vizier Mahendra, was raised from orphanhood by Mahendra, fostering deep loyalty towards his adoptive father and the kingdom. He serves Sindhura with pride and honor, guided by his religious principles.

Initially, Prince Gadevi assigns Jaswant to infiltrate Prince Rajendra's camp during the succession struggle. Disguised as a guide, he joins Rajendra and Arslan's forces. His true allegiance is uncovered by Arslan's strategist, Narsus. Facing execution as a spy, Arslan intervenes, sparing Jaswant's life out of recognition for his orphaned past and debt to Mahendra—an act that profoundly impacts Jaswant.

After Gadevi's defeat and Rajendra's ascension to the Sindhuran throne, Jaswant chooses not to formally align with Pars. Instead, he personally pledges loyalty to Prince Arslan to repay the debt for his spared life. He joins Arslan's camp as an aide-de-camp, participating in later campaigns while steadfastly maintaining his Sindhuran identity and faith. His loyalty shifts from institutional Sindhuran ties to a profound personal commitment to Arslan, though he retains respect for former superiors and holds no grudges against past adversaries.

Characterized by honor, self-respect, and independent judgment, Jaswant demonstrates flexibility in his principles. He chooses to inform Narsus of Rajendra's schemes against Pars after Rajendra becomes king, viewing this action as part of his repayment to Arslan. He uses formal pronouns like "watashi" when addressing Arslan, reflecting his respect, though he occasionally employs casual pronouns like "ore" in less formal contexts.

Physically, he possesses short black hair, dark brown skin, and distinctive aqua-colored eyes, with upper eyelid shapes varying between manga and anime depictions. His design consistently emphasizes his Sindhuran heritage across adaptations.

Jaswant dies in Pars Era 325, concluding his role as Arslan's dedicated follower who balanced his Sindhuran roots with his personal oath to the prince.