[hider=SCP-666]
SCP number: SCP-666
Nickname: The Demon
Real Name: Allan Rutherford 
Rank: Keter
Appearance: the one on the right
[img]http://fc01.deviantart.net/fs71/i/2013/226/b/1/jeff_the_killer_before_and_after_remake__by_gemmylulu5-d6i2gvv.png[/img]
Powers: A host strong enough to manipulate SCP-666, such as Allan, can use it's powers and engulf their hands or feet in a strange shadowy substance that increases their strength. 
Personality: SCP-666 is described as malicious and evil, however it's true intent is unknown. 
SCP-666-B seems extremely calm, usually seen mumbling to himself which is presumably directed toward SCP-666. He also refuses to speak to SCP staff members
Bio: The true SCP is actually a demon, only referred to as The Demon by its hosts, that uses unknowing people, usually younger children, as its hosts. It grants these hosts powers while allowing SCP-666 to use their body to manifest physically into this world. The facility has never seen this happen though as most hosts are too weak due to paranoia or insanity caused by SCP-666. It's host is classified as SCP-666-B. SCP-666-B was found within a few months of the former host dying and was at the time 5 years old. His name is Allan Rutherford and as of now his age is 15. 
[/hider]