One problem that jumps out at me is the question of why Hayate was summoned. Since that summoning was done without any kind of focusing artifact, the Servant summoned has to have a personality that is compatible with the summoner, and I don't think Hayate's personality is compatible with that serial killer's personality.
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Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber." --Krityan Elder, Tales of Vesperia.
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Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber." --Krityan Elder, Tales of Vesperia.