Isn't K/DA missing a certain dancer?

So...we have an all-girl song and dance group--how is it that one of the all-stars of the rift, whose inherent gameplay involves dashes, dances, and flips, got completely left off?

Where is K/DA Irelia? She and K/DA Kai'sa should be best buddies, no? You could have her blades be neon blacklight violet glow-stick blades that'd be completely at home at a rave, and the next music video could be a more dance-centric thing rather than the Ahri/Akali glamour thing that POP/STARS was.