In Episode 11 of the third season of "Tate no Yuusha no Nariagari," titled "Justice vs. Justice," a dramatic confrontation unfolds between Rishia Ivyred and Itsuki, the Bow Hero. The setting is the underground colosseum, where Rishia, once considered weak and expelled from Itsuki's party, now stands as his challenger. Itsuki, entangled in a web of deceit spun by Malty, is convinced of his noble cause and sees himself as the embodiment of justice. To him, Rishia is merely an obstacle on his righteous crusade.

During the battle, Itsuki believes he is a symbol of absolute righteousness. He wields his power fervently to defeat what he perceives as the evil and corruption embodied by Naofumi and his allies. Itsuki's accusations against Naofumi—ranging from exploiting child slaves to neglecting the needy—are firmly refuted. Naofumi exposes the flaws in Itsuki's reasoning, pointing to his own failures, including his inability to defeat the Spirit Tortoise.

Rishia, embodying her newfound strength and resolve, stands unwavering against Itsuki. She challenges his distorted sense of justice and showcases the skills honed through rigorous training. The arena becomes a crucible for their opposing ideologies—Itsuki's misguided justice versus Rishia's sincere desire to save him from his own delusions.

The influence of the Curse Series on Itsuki becomes increasingly apparent as the battle intensifies. Rishia, unshaken in her determination, confronts Itsuki, resolved to pull him back from the brink of self-destruction.

Rishia employs a secret technique to counter Itsuki's attacks. She extends her hand, pleading with him to abandon the corrupting influence of the Curse Series. Yet, Itsuki sinks deeper into his justice-fueled madness, his mind fracturing under the weight of his own convictions.

In the end, Itsuki is overwhelmed by Rishia's steadfastness and the realization of his own folly. He must face the consequences of his actions, including the debts incurred through Malty's manipulations. The episode concludes with Itsuki being taken to Naofumi's village, where he begins his path to redemption.