The Spectre

The Spectre takes on no physical form; instead, its presence noticeably twists and distorts the environment it is present in—often signaled by a red-and-black sky or thick mist that appears moments before its unfortunate victims are damned/forsaken. However, as seen in its ROBLOX account (which may actually hold some canonicity), The Spectre appears to like fancy hats as its avatar wears one.