Brunnhilde (also known as Valkyrie) is a heroine from Marvel Comics. She is mainly a member of the Avengers and the Defenders.
An Asgardian by birth, she was selected by Odin to lead the Valkyrior. Among her other aliases are Barbara Denton-Norriss, Samantha Parrington, and Sian Bowen who all were host bodies to the spirit of Brunnhilde. Samantha Parrington, a previous host of Brunnhilde, later received Valkyrie's powers and became a member of the Defenders herself. She is also an ally and one-time love interest of Thor.