Very similar to a dressup game, on Deviantart I found a game where you can create your own Soul Eater style souls (: I know how hard it is to find an original one over google or deviantart, so this'll help a lot.
http://mirukutea.deviantart.com/art/Soul-Maker-v-02-113296184
Here you could make almost any type of soul you want with combining facial expressions, and even accessories. ^_^
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Subject: Soul Creator