For those that don't know or remember, Chaos is the blobby water monster from Sonic Adventure, mainly known today for allowing artists to use an existing character to create tentacle porn. There are quite a few images featuring Chaos on this site, and few of them seem to be consistent: monster, chao, humanoid, chao + humanoid, chao + humanoid + goo, etc. The various Sonic wikis are a little more consistent, from a mutant Chao to a mutant Chao/water beast to an ascended Chao. Chao probably belongs somewhere in there, but would humanoid or goo be just as appropriate?