Doranvi is a supporting character from the anime Bye Bye, Earth. She is a female member of the aquatic mermaid race and is affiliated with a group known as the Hunger Alliance, where she eventually demonstrates her capabilities as the alliance's leader. Her most prominent role in the story is that of a highly renowned and exceptionally talented swordsmith. She is specifically recognized for forging a sword for the character Sian Lablac Adonis, an achievement that highlights the extraordinary quality of her craftsmanship.

Doranvi's approach to her work is notable for its creativity, as she is known for her ability to craft original and unique swords. Her background as a mermaid allows her to blend traditional knowledge with this innovative mindset, solidifying her reputation as a master swordmaker. Her personal history includes being an old acquaintance of Sian Lablac Adonis, a relationship that adds depth to her interactions within the narrative. Her abilities lie not in combat prowess but in her singular skill and artistic vision as a creator of distinctive and powerful weapons.