Mileena is associated with Outworld in Mortal Kombat X , and in the story she leads a rebellion after being deposed by Kotal Kahn.

Quick scoop

  • She is not tied to one of the player-selectable factions in the usual multiplayer sense.
  • In the story, her side is essentially Outworld loyalists / Mileena’s rebellion.

In plain terms

If you’re asking about her storyline allegiance, the answer is Outworld. If you mean the game’s faction system, she isn’t one of the standard five joinable factions; those are separate from character affiliations.

TL;DR

Mileena’s faction in Mortal Kombat X is Outworld , with her story role centered on a rebellion against Kotal Kahn’s rule.