Cosplay Succubus: This offshoot of the succubus family feeds solely on the attention of men; thus, the convention environment, with its wildly skewed male-to-female ratio, provides a perfect feeding ground. By dressing up in skimpy, geek-culture themed costumes, the cosplay succubus ensures that simply walking down a hallway draws crowds of socially awkward males to them. The cosplay succubus is essentially harmless, although some men have been known to injure their brains wondering if the girl dressed as Witchblade is single. If you need to escape from a cosplay succubus for any reason, get someone to ask to take their picture--cosplay succubi are absolutely unable to resist the lure of a photo opportunity, and will freeze in position for hours if they believe that someone is taking a picture of them.
A much rarer and deadlier creature is the cosplay medusa, and unfortunately, the only way to tell them apart is by visual inspection--by which point it's too late. These sad, deluded creatures believe themselves to be a cosplay succubus, but insist on dressing in a ludicrously unflattering costume. The cosplay medusa will not turn you to stone, but after seeing a 40-year-old man dressed like Sailor Moon, you may very well wish it had.