Tessaiga is a powerful sword wielded by Inuyasha, a half-demon character from the anime and manga series Inuyasha created by Rumiko Takahashi. Forged from the fang of Inuyasha's father, the sword has the ability to absorb the power of defeated enemies and can unleash devastating attacks, including the Wind Scar technique. The sword is significant in the series as it symbolizes Inuyasha's struggle between his human and demon heritage. Throughout the story, Tessaiga evolves, gaining new abilities and forms, reflecting Inuyasha's growth as a character and his journey to protect his friends and loved ones.