Konstantin Vasiliev

"It was not my idea."

- Konstantin to Villanelle after she realizes he betrayed her.

"Language is information and information is everything."

- Konstantin's motto regarding the importance of knowing different languages.

Konstantin Vasiliev is a prominent character in the Villanelle novel series written by Luke Jennings, and a major antagonist in the TV series Killing Eve, being the secondary antagonist of Series 1 and a supporting antagonist in Series 2. He will presumably return in Series 3.

He is a former member of Russian Intelligence and employee of the Twelve who worked as Villanelle's handler. After his betrayal, the two go on the run as freelance assassins to earn money. He eventually betrays Villanelle by helping Carolyn Martens place a hit on her for the Twelve so that he could reunite with his family.

He is portrayed by.

Past
While not much of Konstantin's earlier life is specifically revealed yet, it is known that he did marry an unnamed woman and had one daughter named Irina. He also taught her different languages that include English, Mandarin, Spanish and German, noting that it is important to know different languages. At some point earlier in his life, Konstantin was employed by an organization known as the Twelve, primarily working as a handler for any assassin who is assigned to him and would hand them any targets that the Twelve wanted dead.

In 2014, he was assigned to break out and recruit Nadia Kadomtseya from a woman's prison in Russia, who was being assisted by her fellow inmate, Oksana Astankova. Konstantin met Oksana, who went ahead to see if he had arrived and seeing her as to having true potential as an assassin, he decided to recruit her instead and they both left Nadia in prison. Afterwards, he told her ex-lover Anna Anmokoba that Oksana had died during her prison escape.

Over the next four years, Konstantin trained Oksana (now better known as "Villanelle") as an assassin and would give her targets from the Twelve, for which it garnered her an infamously intimidating reputation. However, he would also have to sometimes convince the Twelve to give her another chance whenever she went off the rails.

Series 1
In 2018, he returned to Villanelle in her apartment in Paris to give her bonus payment that the Twelve has given her for assassinating controversial Russian politician and sex trafficker Victor Kedrin in Vienna and to give her another job in Tuscan. Two days later, he returned to Villanelle and informed her that Victor's girlfriend Kasia Molkovska had witnessed his death and will be interviewed by MI5 in London the next day. He then sends her to kill her that night to stop that from happening and to make it look like a suicide.

A few days later, Konstantin returned to Villanelle and refused to give her the assignment she was excited for, wanting her to get reassessed due to not making Kasia's death look like a suicide. During the assessment, Villanelle is passing with flying colors until Konstantin asks Jerome to bring up Anna, which causes her to not get signed off. The two left and argued but Konstantin insisted that he was simply worried about her, but as she hugged him, she stole the postcard for the job as he left. The next night, he confronted her after

Series 2
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