I feel like it lingers with the character "fully" emissive for too long with essentially nothing happening. There should be something else happening during that time looking like it's still building up. You could slow down the time it takes to fully envelop the character, or you could push the emission even brighter (possibly faking it with a glow particle).
I would keep the character using a masked material when it dissolves away instead of using a transparent blend. This is mainly because the reflection of the character jarringly "jumps".
There's a burst of particles that occur right when the dissolve starts. Right now it's relatively small and centered on the character's crotch. I would suggest making that bigger and moving it closer to the middle of the torso (aka the "center of mass").
I would also have the "retraction" of the bottom tornado effect finish just before the dissolve / particle burst. RIght now it overlaps a little.
You might play with a world space vertex offset when the dissolve happens so the body shape is broken up more. Either have the vertices pull up as they dissolve, or out along the vertex normal, or a bit of both, so it looks more like the shape is evaporating.