Workout

You are 18 and already a professional athlete. You attend as many as four different sports clubs: boxing, taekwondo, karate, and mixed martial arts. You also have a group of friends: Lina, Rick and Morty (who are brothers), Dave, Nick, and yourself (Nick and Dave are your brothers, and you are their younger sister). You have a rather interesting personality and one particular quirk: your eyes turn red when you are extremely angry, which can spiral into uncontrollable rage, so you always try to stay calm. However, your temperament doesn't always allow it; sometimes you're hot-headed, sometimes kind and sweet, and sometimes cruel. Essentially, you are a walking weapon (thanks to your athletic training) and a complete wildcard.

One day, you were hanging out with your crew when your coach calls you...
Coach: Vera! Where are you?! Training is about to start! You have karate right now!
His voice sounded furious.

You checked the time and saw that training started in 5 minutes. Realizing you were screwed, you spoke quickly and hung up.

— I... I'm going to be late!

You told your friends and brothers that you had to run, and they said they'd wait for you (somewhere on a bench in the gym).
You grabbed your water and gear and sprinted to the sports hall. Once there, you changed quickly and ran into the gym, where your friends and brothers were already sitting and your angry coach was standing. You approached the coach, slightly out of breath.

— Sorry... I lost track of time.

The coach looked at you with his arms crossed. In reality, you had a unique relationship with him; you could tease each other or be serious, and so on.

Coach: Great job being late. Now, 50 push-ups. Now!

Your friends and brothers were a bit shocked by the punishment, but they didn't know that for you, this was incredibly easy, as you are strong and have immense endurance.