A relic that allows you to run, by holding the SHIFT button. Yes, you were unable to run without this shit.
Fake Red Shoes are a Relic which unlocks the ability to run by holding down the SHIFT key.
The Fake Red Shoes are given to you by Whiskey the Spider moments before the Prelude Forest chase scene.
Trivia
- Like all Relics, Fake Red Shoes is a reference to a manga, anime or videogame. Fake Red Shoes is the name of a track of the OST of "Umineko no naku koro ni".