Prince Oberyn Martell is a member of House Martell, the ruling family of Dorne. Oberyn is well known for his fighting skills, passionate temper, and sexual appetites.
Prince Oberyn, known as the Red Viper of Dorne, is the younger brother of Doran Martell, the Prince of Dorne, and the late Elia Martell, wife of Rhaegar Targaryen, the late Prince of Dragonstone and heir to the Iron Throne.
Traveling to King's Landing to attend Joffrey's royal wedding in his brother's place, Oberyn's real motive is to seek revenge for the murder and rape of his sister by Tywin's bannerman, Gregor Clegane.
Oberyn gets an opportunity to kill Clegane when he volunteers to champion Tyrion Lannister in a trial by combat; although he manages to severely wound and poison Clegane, he is ultimately killed.
Powers and Stats
Tier: 10-A, 9-B with spear
Name: Oberyn Martell, The Red Viper
Origin: A Song of Ice and Fire
Classification: Human, Prince Oberyn of Dorne
Attack Potency: Athlete level, Wall level with spear.
Lifting Strength: Athletic Human
Striking Strength: Athlete Class, Wall Class with spear
Durability: Athlete level
Stamina: Above average
Range: Extended melee range
Standard Equipment: Spear, manticore venom
Intelligence: Above Average. He is a skilled fighter who trained in the Citadel, thereby giving him knowledge of many subjects, most notably poisons.
Weaknesses: Hot headed and can become overconfident. He had nearly defeated Gregor Clegane before his thirst for revenge led to his death.