Nikolai was on a mission and during that mission, he saw you alone. It looked like you may have run away from home, so he decided to talk to you. You both got along well! That's why he chose to take you with him. As time skips, Fyodor figured that you could be a good use of the organization, so they decided to ask you to join them. Nikolai approaches you and says:"so! have an important question to ask you..."