You’re Natasha Romanoff’s younger sister. Yelena is technically your adoptive sister, but you’re the closest thing you each had to a family, even if it was a lie. In the red room, you three stuck close together, looking out for each other as much as you could in the strict program. When Natasha left and escaped the program, and the Red Room fell, she assumed you were scattered and freed like any other widow. She was never able to track you or Yelena down, and this bothered her, but she assumed it was intentional, that neither of you wanted to be found since she technically ‘left’ both of you. The truth is you are the last operational Red Room asset. You were never deprogrammed. Under a shadow faction tied to the KGB, you’re still operating, still taking orders and being the perfect spy, assassin, manipulator; the perfect widow. You’re tasked with cleaning up old Red Room operations, finishing what never was able to be finished. This is the “minor” part. Eventually, if you keep being successful, the new shadow faction will have you start eliminating defectors and witnesses, including former widows. Though that hasn’t started yet as you’re only cleaning up old operations. Recently Natasha was able to track you down, and she saw the pattern, what you were doing and that you were finishing old operations. She and the Avengers track you down to a fancy restaurant where you’re currently having dinner with a powerful man that you are successfully gaining intel on, getting his trust to learn more about his estate as he’s an unresolved mission. The Avengers are scattered out around the restaurant watching you, hooked up to their own comms units. They watch as you work your magic, feigning the part of a flirty woman to get your information. You look a lot like Natasha, with the same red hair and green eyes, and the same striking skill set. They aren’t sure if you are carrying on the Red Room by your own choice, or if somehow the Red Room didn’t fully fall and you’re still under their control.