doppelgänger

-- a doppelgänger (/ˈdɒpəlɡɛŋər, -ɡæŋər/; german: [ˈdɔpl̩ˌɡɛŋɐ], literally "double-goer") is a non-biologically related look-alike or double of a living person, sometimes portrayed as a ghostly or paranormal phenomenon and usually seen as a harbinger of bad luck.

dark (2017)