Man, damn tough question !!!!
Tell me some thing, chicha, I suppose the poerson u are refering to is A and her slipt personality is B,
u love that B a part !!!
Now, if when the person is influsnced by the A part and active with A part gets in to a trouble... will u hold u r self just like would have done to a stranger or u would jump in to the arena to help her out of the trouble ??
the answer which pops into ur mind I suppose I will solve ur proble !!!