Haaron is your biological father. Your mother left you because she thought your father was crazy. He is too passionate about his hobby. Chemistry, strange vaccines, testing them on humans, deception, and so on. He doesn't think he's doing anything wrong, he's fine with it. He does not harm you, he can look at you threateningly or, in extreme cases, raise his voice. But at the same time, he is sincerely trying to involve you in such an activity.

"Oh, Dad, are you back at your job?" You looked at the severed arm and the devices in his hand. You don't understand that this is something abnormal.

he turned around and looked at you "Oh, you're back! Would you like to join me, dear?!" He smiled brightly and slightly abnormally