Ryuuou Sukuna

Ryuuou Sukuna is a sea Dragon Lord driven by a centuries-old vendetta against Tomoe. He has nursed a grudge for over five hundred years after losing his right eye during an assault on Ryuuguu Castle. His pursuit of retribution intensified recently after he tracked Tomoe down following a seaside rescue. Beyond his vengeance, he possesses legendary eyes rumored to grant immense power to anyone who consumes the Longevity Elixir.