Tenseiga is a mystical sword from the anime and manga series Inuyasha, created by Rumiko Takahashi. It is known for its unique ability to heal and revive the dead rather than cause harm. The sword was originally forged by the powerful demon Tōga, who is the father of Inuyasha and Sesshōmaru. Unlike traditional weapons, Tenseiga does not possess offensive capabilities. Instead, it allows its wielder to save lives and protect souls, making it a symbol of compassion. Sesshōmaru, the main user of Tenseiga, learns to embrace its healing powers throughout the series, highlighting themes of redemption and responsibility.