Trapped within Johanna’s mind, the Doppelgänger seeks a way to break free and establish herself as the real Johanna Prokuri. Unlike our protagonist, the Doppelgänger enjoys destruction and violent acts.
Her origin is an enigma, as she might theoretically be part of Johanna’s subconsciousness. Montgomery on the other hand supectes that she’s a Dream Demon, as she knows other Demons by name.