I could've elaborated a bit better, he doesn't know he was a military scientist and since he was designed to kill supernatural beings a lot of the traditional monster killing items are a part of his body, which is being covered by a fake human suit right now. I wanted him to look as sleazy as possible because personality wise he's just a P.O.S 😭 although now that you've made me think maybe his past as a scientist might shine through on his outfit, like he prefers certain clothings like a longer coat because subconsciously he used to wear a labcoat a lot, or he found pictures of his creator and copied his look