棟方 夏生

"I'm Agent Natsuo Munakata. Summer Life Corporation...? Ah, what a nostalgic name. But it has almost nothing to do with me. Who'd have thought a little hobby would go this far... but it's over now..."

Not the same person as the real Natsuo Munakata.

His appearance is uncannily similar, but we'll just keep the reason a mystery. He seems to be investigating this world for a certain purpose.