Yoko Hiromine is the new character who dramatically changes the story of Shin Megami Tensei V: Vengeance if you choose the Canon of Vengeance path. Her philosophy is questionable, though, and players keep poking fun at it.
Yoko plays a thematic counterpoint to Tao; she prefers chaos over order because she sees order as maintaining a status quo in which many people suffer. The philosophical struggle between chaos and order defines the Shin Megami Tensei series, and many SMT games present solid arguments for and against both sides. There’s nothing inherently wrong with this, but the way Yoko approaches speaking her mind has made her the center of Shin Megami Tensei V: Vengeance memes.