Is it permissible for me to accompany a girl who calls herself "Ahmad" and claims to have both male and female genitalia, presents herself in men's attire, prays in the men's section of the mosque, and socializes with young men, staying out with them until dawn, knowing that her real name is "Ruqayyah" and she shuns anyone who calls her by it?

If a person is a problematic intersex individual (having both male and female organs, with neither characteristic predominant), they should be treated with the utmost caution. They should be treated as a woman in the company of men and as a man in the company of women. Therefore, their mingling with young people is not permissible, for fear of temptation. They should also consult doctors to clarify their condition and seek treatment.