|The world will be mine.|
— Thatch in "Home alone".
He says he is, and seems to be popular, but a jerk instead, as he is conniving, selfish and mean. He is always looking for things to exploit and use to his advantage. His gang usually includes Slither, Dummy Girl, Mosshead and, occasionally, Harpy.
Thatch displays vampiric traits, mostly his ability to shapeshift into a bat. But oddly, he seems to have no aversion to sunlight as he has been in Deedstown several times during the day. He apparently has acid for tears as he once cried for not having the respect of his gang, his tears burning holes through his cape.
Although he's a bully, once in a while he finds common grounds with Casper and his friends, and even occasionally helps them, but goes right back to being the way he was before, as if nothing happened.
Thatch is mean, cruel and coward, also he despises nice people which leads to a eternal rivalry with Casper, The vampire also loves to tease his classmates, which often become victims of his planks, but he is not as tough as others think, being able to cry acid tears when his gang lost respect for him.
Thatch loves to scare "fleshies", being the best scarer at the academy, He also posseess a power-hungry personality, as it was shown in "Home alone" "Save Graham" and "Cheese": the vampire desires World domination, he is also known for hating humans, more than any other creature in Scare School does.