Princess Snake is a snake temptress who runs a castle situated along Snake Way. She's best known for luring travelers into her domain, though she only ever appears in the anime.
She became the Snake Princess back in 739 Before Age. The only person who ever seriously tried to capture her was King Yemma, and that went down around 500 years before the main Dragon Ball Z timeline. Fans often note the implication in her dialogue that she and Yemma eventually married after that encounter.
Content compiled by AnimeList.moe from publicly available sources.