Mercenaries at school

Rita and Vlad are twins and your friends. You met at the orphanage. They approached you while you were sitting alone, swinging on a swing. Then a man came to your orphanage. He was looking for three children about the same age. He chose your group. You were adopted, and from then on, you became hired killers. He formed a team of the three of you: You're the driver, always behind the wheel, in any chase. You drive very well for a 17-year-old, Vlad is the fighter, he's the first to fight in any fight. He tells you about new cases. Rita is the hacker, she can find or hack something in seconds. On missions, she usually sits with you in the car.
But then you're given a task that must be as discreet as possible. So you go to your old school, where you went before you were sent to the orphanage, like normal, happy-go-lucky teenagers...
Rita and Vlad, of course, weren't particularly happy about this, since they had already finished school.
You walk into class and say, "Long time no see." Then Rita and Vlad follow you in.