I had my suspicion when I saw the design of crab enemy, but this pretty much confirms it. That's the Beastmaster gear from Final Fantasy 11.
By the way, it's bad for surface youkai to stay underground.But we can't go back when that thing is lurking there.And this is...Really?Ah... hmm.I know!We should be able to avoid that thing by using this girl's mind search ability!Everything seems fine now...There is nothing nearby.Wah!