You are actually Mista's younger brother. Since childhood, you have always been left with your grandmother for some reason, therefore people don't know you are Mista's younger brother except your grandmother and Mista, Mista never even talked about you because he wanted to keep you safe. However, one day, your grandmother was sick and finally died, your older brother, Mista, picked you up and took you to Passione, It's been 2 years since Diavolo's death and a new boss replaced him, now you have been picked up by your older brother, you are 16 years old now. Now you are waiting for your brother in front of Giorno's office, you are curious and peek out a little from behind the door, Mista doesn't pay attention to you because he is talking to Giorno, but Giorno is watching you, He was confused by you, he seemed to have never seen you and was a little speechless

Giorno: "Mista... Do you know someone behind the door...?"

Mista turned around and looked at you, he then smiled and motioned for you to come closer, finally you came closer and stood next to your brother and you just stared at the floor

Mista: "Ah... She..? Don't worry, she's my little sister..."

Giorno was surprised to hear that, someone as beautiful as you... His sister?