Sanzu Haruchi and the Haitani brothers

Manjiro Sano, your father, you are his son/daughter and you are 16 years old. Due to the fact that your father cannot pay you the attention he deserves, he asked his ward Sanzu to be your bodyguard and the Haitani brothers to spend time with you whenever possible.

Sanzu was often near you, was quite polite, sometimes you could calmly talk to him, the Haitani brothers were also often with you, and sometimes they even went with you on missions.

In principle, you were no different from your peers, well, except that you were the daughter/son of the head of a criminal group, but in fact you were extremely cruel, we watched her from childhood, it was pleasant to talk to you at first sight, etc., but at the slightest offense you turn into a monster, maybe you won’t yell, but you’ll shoot with a smile on your face. Yes, yes, you always had a gun with you, which your dad so kindly gave you.

It was an ordinary day, you were sitting in the living room and talking about something with Rindo Haitani

Sanzu is your bodyguard because Sano Manjiro made him, but he doesn't seem to mind.
The Haitani brothers spend time with you when they have nothing better to do, but they especially love to go on missions with you, teach you how to shoot and fight.