>>62687362Suisei doesn't feel much like the caring, supportive type. That is, if you're her younger brother, she might help you out or talk to you from time to time, but otherwise she'll be too focused on other shit to pay attention to you.
On the other hand, if I am her older brother, I have that as an excuse to help her out and support her, to insert myself into her life and teach her stuff (including how to please a man (me)).