Spear
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I was also initially wary of this, but why would a mechanic go into the forest? It's as if he's a complete workaholic, spending all his nights and days on the job, etc.
The caretaker doesn't have anything like that, but he does have skill, which is why he tried for a long time to escape, but his skill wasn't enough, it seems.
Although I'm not entirely sure, I can't say that Kosha is 100% a mechanic either.
