Doppelganger is a german word meaning "double goer" It basically means an "evil" and sometimes paranormal twin. Doppelgangers are also known to bring certain misfortune.
Me, but not really sure. the sound show me an image about a guy who found his Doppelganger and have some adventures with him, the guy and the doppelganger fought side-to-side and got a lot achievements but it turns out that the guy's doppelganger is the last boss of the story. what a sad end. Nice track Leaf! don't judge uwu