Lorelei (Earth-199999)

Lorelei is an Asgardian sorceress who can use her voice to ensnare the minds of men. In ancient times, she attempted to conquer the Nine Realms using her abilities, but she was defeated and earned the hatred of Lady Sif in the process. Lorelei spent hundreds of years imprisoned in the Asgardian Dungeons before escaping during the Second Dark Elf Conflict. She then traveled to Earth, seeking to enslave humanity, bringing her into conflict once more with Sif and Phil Coulson's team.

Powers
Persuasion: Lorelei possesses a unique ability that Sif described as sorcery: a super-persuasive voice that allows her to enthrall men. This ability is usually effective through voice, but if Lorelei's victim proves to have a higher will capable of resisting her power, she is able to strengthen the enthrallment through touch.

Abilities

 * Master combatant: Lorelei is a very capable combatant, having received training in unarmed combat and swordsmanship. She easily defeated Melinda May with a single blow and was capable of holding her own in a battle against Asgard's greatest female warrior, claiming ot have defeated her at least once.
 * Sword mastery: Lorelei is highly skilled in the art of swordsmanship, able to hold her own against Asgard's greatest female warrior in a battle. She is also somewhat knowledgeable about swords, since she desired Sif's unique sword for her own.