Alexi Shostakov

Alexi Shostakov is an A.I.M. scientist and Black Widow's husband.

Biography
Alexi talked to his wife about the evils of communism, the futility of war, and HYDRA's power to end both in Russia. When he decided to devote his genius to HYDRA, his wife served beside him until the day she was told Alexi had been killed by agents of the KGB.

When Hawkeye and Black Widow stopped Whirlwind together, she found an inertial field generator on Whirlwind, and recognized Alexi's handiwork. As it was A.I.M. technology, Black Widow tracked an A.I.M. facility in Northern Canada, but was captured when sending a message to the Avengers. Hawkeye went to help her accompanied by Falcon, Scarlet Witch, and Vision.

Hawkeye found Black Widow safe and sound kissing Alexi, now an A.I.M. scientist. When the Avengers attacked the facility, Black Widow and Alexi escaped followed by Hawkeye. Black Widow then explained her history with Alexi, who she believed dead until she recognized his handiwork in Whirlwind's device. Black Widow wanted to take Alexi away from A.I.M. and Hawkeye let her go, later telling Vision that she was never there.

In the Comics
Alexei was a Russian superhero named Red Guardian, the Russian answer to Captain America.