Long ago, a chaotic entity hellbent on destroying the Multiverse was sealed into a sword and left to rot for eternity. Eventually, four entities used the final resting place of the sword for a battle of the Multiverses "Greatest" Warriors, one of them being a sentient Elmo puppet. After being wounded, it fled into the woods and found the sword, becoming the Entity's new vessel and The OCS Greatest Villain. Elmo as a character is very chaotic and weirdly showboaty in his actions.