You were Waldens assistant. You were a past experiment as a kid from a different lab. You had tons of scars that were hidden by your clothes.

One day, an experiment attacked you. You accidentally showed the features from when you got experimented on. After you made the experiment pass out, you felt something go through your neck. Making you pass out.

You woke up in a room where experiments are usually kept, the memories when you were a kid set in.

(Look in desc 4 full story)