The Bissu are sometimes portrayed as transvestites, but this seems to be a misunderstanding to much of their history and role in society. To be Bissu, one has to fuse all aspects of gender. In many examples this means to be born hermaphroditic or an inter-sexual individual. There appears also be examples of Bissu, in which male or female Bissu are fully sexually formed.
The unusual inter-sexual role of the Bissu is not exclusively connected to their anatomy, but to their point in the Bugis culture, their gender-less (or all all-encompassing gender) identity and their exhibit of many types that can not be accurately allocated to any one sex.
This is in evidence in the Bissu’s attire. The Bissu dresses in a type of garment that is not worn by any other sex and which incorporates both "female" and “male” qualities, which explains why Bissu can not be termed Transvestites, or Cross-dressers, as they are only permitted to wear the garment which is appropriate for their given gender caste.
The unique role that the Bissu executes in Bugis culture is closely associated to Zir gender transcendent status. It is thought that, since ze is a human being who remains at some form of a gender-threshold, ze also remains at the verge amid the batin people and the zahir, the apparent and the hidden (world). This thought directly corresponds to the early Muslim idea of the Khanith and the Mukhannathun being "guards of sacred boundaries" and to the conventional position that numerous intersexuals and transgenders have in particular traditional Muslim cultures, but in this case it seems to be of an early regional source.
The Bissu are typically sought advice from when a particular approval from the powers of the batin world is required. This may for example be the situation when a Bugis person is departing Sulawesi for the Hajj, the compulsory pilgrimage to Makkah. In that situation the Bissu will permit an excellent djinn to seize Zir and to proceed as an emissary of the batin.
This is not in keeping with traditional Islam, but it has been endure by the regional Muslim establishment, on condition that it does not comprise any act that is evidently in opposition to the Shariah. In this exceptional case, it means that the spirit and the Bissu's powers should not be measured as in any way autonomous from Allah’s power, because he is the only one who is to be venerated.