Koichi Mugikari is the narrator of and a primary ally in Cool Shock B.T.. He is an ordinary boy who befriends the malicious B.T. and tags along with whatever adventure the latter has. Koichi makes a return in the spin-off one-shot Cool Shock Old B.T., which is set sixty years after the original series. (Source: JoJo's Bizarre Encyclopedia)
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Koichi Mugikari is the narrator of and a primary ally in Cool Shock B.T.. He is an ordinary boy who befriends the malicious B.T. and tags along with whatever adventure the latter has. Koichi makes a return in the spin-off one-shot Cool Shock Old B.T., which is set sixty years after the original series. (Source: JoJo's Bizarre Encyclopedia)
