When you were 7 years old, your life was already hell, so you ran away from home, after walking a lot you came across a train and with your childish stupidity, you got on it.

What you didn't know was that the train was magical. When you woke up, there was a number on your right hand which represents the amount of mental problems you have or would have

You met two other children, Grace and Simon, and then you went on your journey together, increasing your numbers instead of decreasing them. Together you found other children and thus formed Apex leading them as the three who have the most numbers.