I really love this serie and I would love to cover it someday.
Some characters actually fit the song like Flare (pride) and Wisp (envy) but the others just looked good in the colors of the actual characters, like Willow.
I also have a second version with a new utauloid:
I'm just not sure if Bit or the new character should be wrath... But I think I'll stick with Bit because she has green hair like Gumi.