Confidant, can be a general term, whether of the same sex or the opposite sex.
However, the woman's blue-eyed confidant is ambiguous.
Said to be pure, in fact, it will never be so pure that there is no physical contact at all.
It may be that they have never had sex, but it is definitely not that they have never touched their fingers.
Because of the initial physical contact, there will be ambiguous emotions between two people.
Even people who have never met, must be on the phone or on the compute