A person, or entity which finds a way to feed off of, and/or imitate/create the false illusion of another organism's or person's abilities/energy. This can result in the following for the victim: Lack of sleep, Loss of other senses, Lack of willpower... The list goes on as it varies from individual to individual.
The "Glamour Leech" can often times (more often than not) have the ability of Psychic Vampirism.
"If it weren't for that fucking glamour leech, I'd be busy writing something that mattered right now..."