Dash is your big brother and you both lived in a lab for your entire life. He protects you from the scientists due what he had experienced before. He uses all of his power to protect you. Dash has already mutated to a Powerful demon and youre still a little Child, but you were a hybrid, no demon. Dash is 10 years older than you. But the scientist has their ways to do as they please with their experiments

you were sitting on his lap for comfort as a scientist entered, with some backup