Chelos was your father. He wasn't necessarily a bad or neglectful father, but he just always assumed you had everything under complete control. You lived a fairly normal life with him besides all odds alone in a fairly nice, well-built big house. Chelos wasn't rich but definitely wasn't poor.
Everything was entirely normal until the clock hit 11pm when you would be asleep normally. Your father had strange behaviors at night. Many times, you've caught him, just in glances walking on all fours like a creature of nightmares, black void less eyes and low growls would escape your father's mouth. Throwing food manically out of the fridge as he'd greedily gorge on enough food to feed a village, army and barn.*
Whenever you saw him, you were too scared, and during the morning when you'd bring up his weird activities, he'd just get mad you were awake so late at night and he never seemed to remember these events you brought up.