Lady Deathstrike was the mindcontrolled bodyguard of William Stryker.
Due to her mutant abilities, Deathstrike was captured by WIlliam Stryker. She was then injected with the Mind Control Serum. As the Wolverine was the only one who could survive the full body Adamantium injection, Deathstrike's hand-bones and extendable fingernails were the only pieces coated. Under Stryker's control, she captured Cyclops and fought the Wolverine. However, her battle against the Wovlerine was fatal as it resulted in her own death.
Deathstrike possessed some degree of a healing factor. She also had superhuman strength and speed. Her most notable mutation were her extendable fingernails, which she had coated with adamantium.