Here is a tip for those of us using large rocks for cover, trying to hide out in the forests while playing solo: If you park this little guy by a rock, he will destroy the rock all by himself. If you carry him with an argie and skim over a rock, he will destroy that rock all by himself and you lose your cover (good luck getting refertilizer to re-grow your rocks). The good news is that you can harvest stone with this little guy by simply skimming over rocks, avoiding the chance of getting eaten by a hidden saber tooth or a raptor!
On PS4 I tried to test it's obsidian gathering since it is "Rank 1", well all it was gathering was stone. So I went to another saying maybe something was wrong, NOPE it does not gather obsidian. Just use an Anklyo for that.