[quote=@Razael]
praise teh emperah! Though I am leaning a bit  Xeno Filth just because the Orks,Tau and especially the Dark Eldar can get really scared, especially the DE once they know that Slannesh is involved.
[/quote]

Orks, yes, but not the Nobz. Boyz and Grotz are only fearless when they are in great numbers or with a Nob, because the Waaagh! field convinces them that they are invincible. Nobz generate their own Waaagh! field. This is because they are the biggest 'n da strongest, and all of the Ork Boyz in the universe believe them to be big and fearless, meaning that they are so. But, get Grotz and Boyz alone and they will run away like a bitch.

But, yeah, I can see a Tau being the "Quiet religious one that goes insane" of the group. And Dark Eldar need the pain and suffering of slaves around them in order to keep Slaanesh from eating their souls, so being caught alone, and surrounded by Slaaneshi worshipers, I can see one going absolutely nuts with fear.