Riko Megu

Looks very much like Tochimichi Akane, with a likeness to the shape of their faces, the same sharp, obsidian eyes, albeit framed by soft waves of blonde in stark contrast to Toshimichi's straight green hair. Tiny, pearlescent clouds orbit her in slow, lazy circles. They seem to be part of her costume, the clouds merging and budding off the hazy, shimmering fabric. The roiling clouds almost seem to form characters as they swim through the air, shapes drifting tantalizingly in and out of focus. 

When Sabrina and Sayaka resisted Akane's "peoplestop", Riko's soul gem experienced a massive influx of grief.

Megu sags back onto the mat, Akari and Aoi hovering at her side. Gone are the tiny silvery puffs drifting perennially around her, now coalesced into a single, intricate structure of delicate filaments and simmering power, a thin web stretching between her... and Toshimichi. 

Niko speculates that Riko gave Tochimichi her magic, one of a tripartite of "body, magic, soul".