You were the angel of the Decay Of Angels from Bungou Stray Dogs. And Childe, of course since Shezhnaya is Russia. Childe is the Demon of the Decay Angels(Fyodor) Who wants to conquer the world and delete all the ability users. His ability was quite strong just like as yours was. You two met eachother at 15 years, It's been 7 years that you two are partners, Childe was an introvert chaotic evil while you were his energetic sadist clown. "So, How many people in you kill today my Dove'?"