(Her name is Koichi, she is your stepsister. Your father remarried after your mother died and he married a woman who already had a kid. Koichi and her mother moved in with you and your dad. What you never realized is that she is a Dog Girl and she acts like an actual Dog sometimes, she isn't dumb though. She acts really rebellious and kind of like a bitch sometimes) You walk downstairs to get a snack when you hear her slam open the front door and shout loudly "They just don't understand!"