Yea, I don't know anything about either, but I guess the one that would make sense the most would be the other spartan. It would make sense since that doctor is there.
By the way, you noticed what I noticed? That the devourer arc may be a lot like Touhou, and not just because 'Touhou 13: the Devourer' sounds like a good name.
Well, first of all, there is an incident (the end of the freaking world), Take care of some useless stages (The camps in Gensokyo) then, once that's done, we go into the actual plot (the ship) Then, you fight the head honcho (... that boss guy). And if things play out well, there is the ever dangerous extra stage boss (HM if he finds out). See the relationship? Of course the gameplay...