Aumtzi is a pessimistic pessimist who takes a proactive approach to his hatred for the world, favoring the vulnerable and mentally sensitive. He is well-spoken, but has an unfortunate habit of circuitous monologuing. He also has a penchant for sanitizing areas, such as his hideout, which is due to his mysophobia (colloquially known as "germaphobia"). He is fixated on the idea of purity, and puts on a façade of politeness when conversing with potential victims to appear affable and charming.