Description
Princess Sheila Tuel Metallicana, daughter of the King of Metallicana and sister to Lars Ul Metallicana, is an 18-year-old woman with long black hair and violet eyes. She is typically adorned in a revealing white dress and significant jewelry. Her personality blends a strong sense of duty to her family and kingdom with inherent naivety stemming from a sheltered upbringing. Though generally shy, she displays courage when necessary, such as insisting on joining missions despite lacking combat experience.

Her story starts as she questions Lucien Renlen about the sorcerer Dark Schneider possibly returning to save their kingdom. When Tia Noto Yoko is kidnapped, Sheila reveals her basic sacred magic training and volunteers to perform the "Accept" spell—a sealing ritual requiring a virgin maiden's kiss—to awaken Dark Schneider from within Lucien. She overcomes her father's objections by stressing the importance of aiding the kingdom's protectors. Following Dark Schneider's resurrection, she accompanies him to rescue Yoko, openly distrusting his motives and refusing to stay behind. Her inexperience leads to peril, like triggering a poisoned sword trap, forcing repeated interventions by Dark Schneider.

A critical revelation emerges that Sheila harbors the final seal of the destructive goddess Anthrasax within her body. Surviving the destruction of Castle Metallicana after a two-year timeskip, she is transported to the flying city of King Crimson Glory. Dark Schneider places her in a magically induced sleep to hide her from the antagonist Kall-Su. This state weakens over time, subjecting her to nightmares where Anthrasax attacks while her brother and Dark Schneider defend her. Awakening, she witnesses Kall-Su's assault and Dark Schneider's temporary bisection. Kall-Su attempts to forcibly break the seal within her, causing excruciating pain halted only by Dark Schneider's resurgence. Despite this, the seal destabilizes, indicating ongoing vulnerability.

After a subsequent four-year timeskip, Sheila participates in a coalition of various races aiming to thwart Satan's "Negative Genesis" plan by lifting the seal on the moon. Her abilities remain confined to foundational sacred magic, with the "Accept" spell being her only explicitly documented capability. Throughout her experiences, particularly during physical interactions with Dark Schneider, she exhibits unintended arousal, leading to internal conflict about her perceived purity and marital prospects.