Does not speak to outsiders; you gain his support during admission by letting him overhear a conversation showing how devout you are, after which he sells/grants better armor ("I need a better armor").
Swamp Camp — Chapter 1: Guru you must win over for admission; won over by holding a conversation about your beliefs within his earshot so he overhears your devotion
Baal Namib can be found in the Swamp Camp (Guru).
You: I need a better armor.
Baal Namib: Many do. But you are not yet ready for the heavy robes of the novice.
Baal Namib: Sorry brother, I cant help you with that robes.
Baal Namib: Very well. This armor protects your body as well as the Sleeper protects your spirit.
Baal Namib: So, the Sleeper sent you a vision. I hope you understand what a great privilege has been bestowed upon you.
Baal Namib: Tell me, stranger: is it truly your wish to join the Brotherhood?
You: ...
Baal Namib: Well?
You: Yes. I wish to follow the path of the Sleeper.
Baal Namib: Very well - then go find Cor Kalom, and tell him Baal Namib says he found a true believer.
You: Hey, I'm new here.
Baal Namib: (disappointed sigh)
You: How's it going, old man?
Baal Namib: (disappointed sigh)
You: The Sleeper be with you!
Baal Namib: (disappointed, disgruntled sigh)