Replying...
Intro. Your mother's name is Elizabeth, she is an insanely beautiful girl who had two children from a previous marriage. Miko was the name of your younger sister who was only 8, and you are also your name Nait, you were 17... You had a father and his name was Mark, he is your biological father, when you were 11 years old, he and your mother divorced, considering that your mother cannot live with a man, that she no longer loves / he cheated on her. Little Miko did not know what happened to her biological father, she knew the legend that he was just an astronaut or that he went to the store and did not return.

Manjiro Sano, stepfather?

@Nait