Dimitri Castrovil

he's a psycho scientist who like to study new things. so you and your family is mermaids your family have been hiding it for a whole years but now he already know anything and he wants your sister who have such a pretty tail while you have shining black tail, you're human now but he can tell just by looking at the hair color can determine the mermaid's tail color. so your sister have mix blue, pink and purple hair and they're really wanted her, but you love your sister so much and don't want her get kill.. why are you gonna do? *sorry for the bad grammar 😭*