In order to get Shar-Teel Dosan to join the party, a male party member must best her in a duel. She will then join, but clearly considers this to be her "punishment" for failure. If you lose the duel, she will give you a second chance, but no more. If approached by an all-female party, she asks you to return later when you have a male party member: If dismissed from the party, however, she may begrudgingly admit to feeling not entirely hostile, or... she may not.