This paper model is Me-Mow, an assassin that appeared as a major character in the episode "Jake vs. Me-Mow", based on the American animated television series Adventure Time, the papercraft is created by WebDude.
Me-Mow is a tiny white cat with cream/tan colored striped fur. She has large pink eyes, a mouth with pointed teeth, and razor sharp claws. Her tail is unusually long and prehensile, and she used it to carry a test tube of red liquid, which is an antidote to her poison. Her tail can puff up during attack mode. She carries a syringe, that has a picture of her face on it, filled with green poison. She keeps a dagger in her mouth or throat.
Pendleton Ward has confirmed that Me-Mow is a fan-made character, and is included in the show because "it's so cute and it was drawn by a tiny kid." She is a second-class assassin of the Guild of Assassins and is trying to kill Wildberry Princess to become a full-member assassin.
A note was stabbed to Wildberry Princess' doorman, which said, "we are going to assassinate you." During the episode, Me-Mow poisons Jake with a syringe full of green liquid that is capable of killing a dog fifty times the size of Jake. Jake grows his liver to fifty-one times the size of an average dog, stopping the poison. Me-Mow stated when she failed her assassin's test that she would have to wait a year to retake it. [Source: wikia]