[quote=@Shard]
Your gender fluid character can by all means be atheist, and use their appeal to seduce. However, just remember that being public with either their gender identity, or their atheism would very well get them killed. "Atheist, and proud" kind of conflicts with their fear of persecution. 
[/quote]

Just because one is proud doesn't mean they are stupid about it. One who is black and proud wouldn't go into a KKK meeting and flaunt it, unless they want to die or seriously hurt.