Koumei is the dealer of fate. Pulling from her hand of dice and cards, Koumei manipulates the threads of fate with each passing moment. Koumei is a very special warframe. To understand koumei you first understand the strands of reality that she pulls on to empower her. As time passes in a mission, Koumei is granted sets of quests that bestow her buffs on completion. These buffs can vary from minor, to absolutely game-changing. Adding to her flavour as the gambling warframe, the effects and efficacy of Koumei's abilities are determined randomly by rolling a set of 5 dice with each cast. All of this gambling strangeness makes for an extremely engaging warframe to play. Her abilities themselves cover all bases. With status effect application, damage, and durability, Koumei is a complete package. Though her power can vary drastically depending on your luck, I would still recommend Koumei to all players due to her potential peaks of power and early availability,

prerequisite: saya's vigil quest compelted

How to obtain: farm shrine defense at saya's visions on earth, or purchase from 
koumei's shrine in cetus