[quote=@MelonHead]
1. As far as I'm aware the only way to become an 'immortal' is to get the sickness and transcend, so my character would have likely grown ill before his last fated act as a Slaver, namely getting stuck in a cave, screwing a bunch of his pals over and then getting attacked and nearly drowned in an underground reservoir by Hollow.
[/quote]
K

[quote=@MelonHead]
2. How does your character's personality/memories etc change when they become an Immortal, as the slaver backstory was going to be a big part of my character, but obviously he's changed into an immortal since.
[/quote]
It depends-- it could be that you don't really change at all, or you could become calmer because you've got a calming power or something-- it really depends on how you'd like to see them change.

[quote=@MelonHead]
3. What would be a good birth place for a son of a whore? Also, in his new (hopefully) profession as a rain-maker, or rather someone who's going to get people to pay him to make/find wells or reservoirs for them, what would be a good place to be based initially.
[/quote]
Tas if you want to be Asian. 
Serenity if you want to be anything but Asian.
Eton if you want to be [s]evil[/s] Forsaken.

[quote=@MelonHead]
4. Will the Aqueous faction be trying to kill my character, because he's effectively giving away one of their main advantages for only a small fee.
[/quote]
Probably.

[quote=@MelonHead]
5. Does any of this work? 
[/quote]
YAS
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[quote=@RedDusk]
But then, how about animals in the Dust? Are they all gone with the Fall? Or horribly mutated? Do we have pet or mount around here?
[/quote]
Yes.