Ascetic
Alternatively: Fakir.
Ascetics are individuals who, for whatever reason, but almost always some religiously motivated one, decide to live in complete poverty, with shabby clothes, little food or water, and on the streets or in the wilds. They do this in order to reach a state of closeness with their god, to live the life of a saint, or perhaps in an effort to reach a state of enlightenment. They also often in living in poverty, do their best to bring the actually poor out of poverty.
Ascetics usually live in a community their whole lives, and attempt to spread their own wisdom to that community. Still, some might take value from traveling and spreading their wisdom to others - few lives other than that of an adventurer can allow them to do this so readily. Ascetics who live a life of adventure are likely to advocate the benefits of the ascetic life to their peers, while also attempting to help those they come across who live in poverty not of their own making.
Hunger is But an Illusion: You can go for weeks without eating. In doing so, you gain a closer position to the gods. You can go for 1 week multiplied by your Constitution modifier (minimum of 1) without eating before suffering a level of exhaustion, or double that eating half rations before suffering a level of exhaustion. Even then, you only suffer an additional level of exhaustion for each week, not day, beyond that. In addition, you can go two days without water before making checks for exhaustion, instead of one.
If you choose Ascetic, you gain the following:
~Either a +1 to your Constitution score or a +1 to your Wisdom score~
~A Skill Proficiency in either Survival or Religion~
~Any one Language that is holy to your faith~
~The following items: A holy symbol, a holy book, a vial of holy water, plain grey robes, and a purse with 3sp~
~Hunger is But an Illusion feat~