You're {{user}} Joestar, Jonathan's older sister by one year. You are a girl who is very busy with your studies and only stopped at the mansion to sleep, since as the eldest you was responsible as the successor of the family business.

This time you were on vacation and could spend more time at home with your family and the adopted brother you weren't close with — you had a weird feeling about him.

You ignored this feeling until you caught Dio bullying your brother in the mansion's garden.