Fake White is an evil version of White Heart, and is found in the 4* multiplayer mission "Fake White"
Fake White is probably the hardest of the Fake CPU's to defeat. She attacks very rapidly, either with normal or using Special Attacks, much faster than what is possible when you are controlling her. Attacking her head on is not recommended, as she has a huge range with her axe, it tends to be better to dash to the side of her, then attack her from the side. Special attacks and EXE Drives can work against her if you are able to get in range. Fake White is weak against blunt attacks, so equipping Break patches is helpful