
From what I've seen in the game so far, never. At least, not an actual, living soul.
You may find that the relic weapon quests are of interest though! The weapons are infused with a variety of things, some of which are the aether/souls of slain monsters.
Alternatively, we also have the Soul Crystals, which, while not the holder of a soul, are basically everything else. Memoriesand experiences of the past wearers are etched into soul crystals, which is basically how we as players get so good at jobs without any of the training.
You may find that the relic weapon quests are of interest though! The weapons are infused with a variety of things, some of which are the aether/souls of slain monsters.
Alternatively, we also have the Soul Crystals, which, while not the holder of a soul, are basically everything else. Memoriesand experiences of the past wearers are etched into soul crystals, which is basically how we as players get so good at jobs without any of the training.