Ranma ½ (Japanese: らんま ½⁠, Hepburn: Ranma Nibun-no-Ichi, pronounced Ranma One-Half in English) is a Japanese manga series written and illustrated by Rumiko Takahashi.

Ryoga Hibiki (響 良牙 Hibiki Ryōga) is a major character in the comedy manga and anime series Ranma Ranma Saotome's eternal rival, the only one he has outright stated to truly consider as such, arguably the tritagonist, and one of the most powerful fighters in the series.