Valentina Vostok

Lt. Col. Valentina Vostok of the Soviet Air Force stole an experimental Russian fighter plane in order to defect to the United States. The plane malfunctioned en route and she crash-landed at the spot where the original Doom Patrol had apparently perished and was fused with the negative energy being which formerly inhabited the body of the Patrol's Negative Man.[2] However, instead of being able to send it out from her body under her control, Vostok gained the ability to transform herself into such a being. Years later, it was revealed by Doom Patrol villain the Brain that Niles Caulder, founder of the Doom Patrol, manipulated Valentina's transformation into a superhero in order to create a replacement for presumed dead Negative Man.

Assuming the name Negative Woman, Valentina defected to the United States and became a member of the second incarnation of Doom Patrol for several years. Valentina became romantically involved with teammate Joshua Clay, aka Tempest, but broke off the relationship due to the nature of her powers changing to match that of her predecessor: her body became permanently radioactive, requiring her to constantly wear radiation-blocking bandages over all of her body, and the energy being would emerge from her under her mental command.[3]

Ultimately, when Negative Man was found alive and rescued by the new Doom Patrol, the negative energy abandoned Valentina and was returned to Larry Trainor. Though she was initially furious at having lost her power and being replaced by Negative Man, his ultimate rejection of the power allowed for Valentina to leave the Doom Patrol on good terms, unaware of the fact that the negative energy being would ultimately return and claim Trainor again, turning him into Rebis.

Valentina would go on to work for the American secret services, being involved in a number of US government departments including serving for a time as head of the Agency and working for the original incarnation of Checkmate.

As the Negative Woman, Valentina formerly possesses a radioactive "soul-self", and was capable of flight, intangibility, and generate minor explosions upon contact with positive energy.[7] As the White Queen, she currently has mastery of military protocol.

• Valentina Vostok appears in Legends of Tomorrow, portrayed by Stephanie Corneliussen.[8] This version is a Soviet scientist who was employed by Vandal Savage to develop a composite "nuclear man" after the latter witnessed Firestorm a decade previously. Savage and Vostok capture half of Firestorm, Dr. Martin Stein, and torture his allies to force him to divulge the F.I.R.E.S.T.O.R.M. matrix's secrets. After Vostok discovers Stein has part of it, she forces him to merge with her despite his warnings of requiring a "quantum splicer" to stabilize the fusion process. Stein's partner, Jefferson Jackson, encourages him to fight Vostok's control, giving Jackson time to break Stein free and escape with him while Vostok loses control of the matrix and releases the energy in a nuclear explosion, though her fate following this is unknown.
• Valentina Vostok / Negative Woman appears in the Young Justice: Outsiders episode "Nightmare Monkeys", voiced by Tara Strong. This version was a member of the Doom Patrol before she and most of her team were killed while on a mission years prior to the series.
• Valentina Vostok, also known as "Moscow", appears in the Doom Patrol episode "Space Patrol", portrayed by Mariana Klaveno. This version is a member of the Pioneers of the Uncharted, a research team sent into space by the Chief in 1955 to find a source of time-dilating power. Her teammates Zip and Spec perished during the mission, but Vostok made contact with the source, which she discovered is a negative energy entity that inhabits her body. Over 60 years later, the now ageless Vostok returns to Earth so she can use the planet's atmosphere to kill alien spores that reanimated Zip and Spec's bodies. This leads to a personal conversation between herself and Larry Trainor over their experiences with their respective negative energy entities and how they impacted their lives. She invites him to join her in returning to space once she finishes severing her ties to Earth, but Trainor declines in favor of repairing his relationship with his family.

• List of Russian superheroes