First appearing in the episode Crusade for the Blade, she attacked Meta Knight trying to seize his sword for herself. She believed that he stole it and left her mother to die by Kirisakin's hands, but was eventually proven wrong when she learned the truth from the sword. In the end, she helped Kirby use Galaxia to destroy Kirisakin, and therefore became friends with him and the others. She later returned in the final episode, joining Knuckle Joe, Sir Arthur, and his knights as they helped Kirby and friends battle Nightmare.
Sirica is voiced by Tomoe Hanba in Japanese, and veteran voice actress Veronica Taylor in English.