Dark Empress Kitana in a NEW Character in Mortal Kombat X. She is a Netherrealm character, so she will synergize well with Revenant Kung Lao and Warlock Quan-Chi, to name a few. Her special ability allows her to "enslave" a defeated opponent and use them to fight on her side. This 'slave' will have no passive ability, but it will be able to use special attacks.
Overall Dark Empress Kitana is pretty good. Her basic attacks are very quick and they feel very easy to use. Her passive ability is not the greatest, but it could be used effectively.
Let me know what team you are using Dark Empress Kitana for in the comments below!