"Power, you say?" the voice muses, seemingly taking a rather playful approach to the young man. As if musing with something which seems entertaining at the moment. As if the "voice" was a "better" to the person before this voice, only existing as a focal point to her amusement. As if caring not for the person, but rather the "event" he had represented. The person before her was simply a petty existence.

"The power of the king is something that many have wanted before. What makes you think that you are someone who deserves power? Who would you want to protect?"

She had appeared before him. Someone who appeared just as one might expect a cosplayer of sorts to look like; the rather antique clothing bearing a resemblance to that of a tradition centuries old Japanese culture, typically woman only appearing this way during times of festivities. To wear such an outfit would be a rather strange action taken by this woman. 

Well, one might have considered this person not a "woman" per se. Rather, this person was considered an anomaly within this plane. A visage that existed only for this "Yamato Shirou" for the time being. 

"Where does your loyalty exist, boy?" 

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Well, that was a rather strange turn of events. 

Live.

"Death or survival is a cheap trick."

Demons are that which feeds upon the body; the soul of the befallers which gains power from those of purity and sovereignty. Existence of demons exist to defeat weaker existences of "purity", creating a system which hunters are to obtain strength and grow from prolonged gorging of the human race. Parasites that exist only to be destroyed, as that was true "justice". 

"But power is something I have longing for. Very well, I accept your contract, otherworlder!"