Scarlet Bond Arc[]
At the start of the movie Scarlet Bond, he and his fellow mercenaries are attacked by Clayman's soldiers, during which he is severely injured by Yamza. He is found by the people of the Kingdom of Raja and is given the name "Hiiro" by its queen Towa to recover from his injuries. Ten days after his rescue, Hiiro escapes Raja to return to the Ogre Village, only to find it destroyed by the Orcs. Feeling vengeance against the Orcs, Hiiro returns to Raja four days later and swears loyalty to Towa. In the present, he and the elders struggle to find a way to cure Towa and upon learning that Falmuth's army was supposedly destroyed to the Storm Dragon Veldora and was pacified by the leader of the Jura-Tempest Federation. This gave Hiiro the idea to reason with Tempest's leader and the elders agree to the idea since monsters are allowed in Tempest.
Hiiro and his two Raja subordinates later travel to Tempest where they fight Geld, during which Geld learns that Hiiro is seeking revenge against his race, so he drops his weapons and accepts his fate of being killed by him. However, Benimaru saves Geld and pacifies Hiiro, who happens to be his childhood friend. Hiiro reunites with Benimaru, Shion, Shuna, Hakurou, Souei, and Kurobe, and reconciles with Geld after learning that the Orcs are no longer their enemies. During a feast hosted by Rimuru, their master and the leader of Tempest, Hiiro reveals that he had arrived at the Jura-Tempest Federation as Raja's messenger to ask permission to cultivate a part of the Great Jura Forest to serve as a food source for the kingdom. He informs that Towa is suffering from Cursed Poison, the effect of using the power of her tiara to purify a lake filled with toxins from the country's gold mines. Rimuru agrees to help and decides to visit the kingdom. Although Rimuru was successful in curing Towa and ridding the lake of the toxin's source, this has angered Lacua, the mastermind behind the events and a subordinate of the Primordial Violet.
Hiiro is later tricked by Lacua to ingest a Curse Orb, being told that it is for transferring Towa's soul to his healthy body, and is fed by him with memories of his village being destroyed to fuel his transformation. Rimuru chases after Lacua, while Benimaru fights the transformed Hiiro and Shuna protects Towa. Eventually, Hiiro manages to remove the orb from his body and destroy it.
Towa uses the full power of the tiara to revive Hiiro from the Curse Orb, causing her body to be covered by the Curse Poison and vanish. However, Violet returns Towa to life after voiding the game as an apology for her subordinate's actions.
Opening of the Monster City Arc[]
Sometime later, he took part in Tempest's festival with Towa. He would share an drink with Benimaru.