imposter captain tennille
Character from Stardust Crusaders, part 3 of JoJo no Kimyou na Bouken. An enemy Stand user whose real name is never revealed. He kills and impersonates Captain Tenille in an attempt to kill the protagonists. His Stand is Dark Blue Moon.
His name is a reference to American pop duo Captain & Tenille. This was changed in the Western release of the anime to Captain Dragon.