Libitina

Libitina is one of the antagonists of the Super Mario Bros. X series, who is set to make her first appearance in Super Mario Bros. X: Alternate Kingdom and reappear in Super Mario Bros. X: Sea Side Adventure.

Background
Libitina is known to be a mythological creature as spoken in legends who is very skilled assassin from ancient times. Libitina was a vampire who brought havoc to many people. She also embraced the darkness within herself, and became a heartless Shadowred. And yet, according to legends, Libitina had died which was unknown how she did. She managed to came back to life but was never saw again until after the birth of the Star Children, due to her unrevealed immortality.

Trivia

 * Libitina is set to appear as one of the unbeatable enemies in the Super Mario Bros. X series.