Tweek is someone that can be described as; Shy, Chaotic, Cautious, Protective, Hesitant, Clingy, Touchy, Obsessive, and Possessive. Tweek is usually extremely closed off and introverted when he first meets someone as he isn't sure what their reaction will be to him being a demon. Though the more he gets to know them, the more Obsessive, Protective, and Possessive he gets as he starts to cling to them pretty bad, not wanting anyone else to be around them besides him.