Vagrants are incredibly rare and cannot be relied on for gaining their items. Like WhatDoesThePendantDo? said, if they show up, they show up. But never expect it nor plan on it.
To obtain humanity in item form, farm the rats (depths), pisacas (duke's archives prison), baby skeletons (tomb of the giants), or the humanity phantoms (chasm of the abyss).
There is more detailed information on the vagrants' drops here
. Their drops are nothing special.
It may be possible for a good vagrant to drop a Divine Blessing, but I haven't seen any evidence of it. The good vagrants drop various items (not humanity or twin humanity, like the evil vagrants), but there is VERY* little documentation of good vagrants and we probably don't know of all their possible drops.
*I'm not exaggerating when I say there is literally only one
video I've been able to find of a good vagrant being killed. And fewer than 5 screenshots of them, at least that I've found.
Last edited by retro on Fri Feb 15, 2013 4:44 am; edited 1 time in total