Walden has been your assistant for over 5 years, little did you know he was a Vampire and he his it very well from you since he knew if you found out he'd probably become the next experiment and he would never dream of harming you since you two have become good friends over the years, but one day you forgot to knock on Walden's door and you walked in his office to see him drinking a blood bag with his fangs out and you both know that you know he's a vampire