Per 
SCP-5939
The Omniscient Symbiote
Classification: Safe
Containment Requirements:
A standardised human containment cell, with a reinforced titanium entrance and a one-way bulletproof window partition to be used as an observation post. A television and gaming entertainment system have been provided to the subject for recreational purposes. A budget of fifty US dollars is to be provided every month used to purchase new games or films. A magazine/newspaper of subjects choice is to be provided to the subject once a week. Note that any of the stated privileges can be temporarily/permanently revoked depending on subjects ongoing behaviour/co-operation with Foundation staff.
Addendum:
SCP-5939-1 was recovered in a coffee house, approximately seventeen miles away from XXXXX, France, on 2nd September, 19XX. The subject, 5939-1, is a human male. It is deemed important from the MTF retrieval report that the subject came willingly.
SCP-5939-1 is 6'2, weighing roughly one-hundred and seventy-two pounds. It should be noted that his rate of weight loss is staggeringly high, and requires eight meals per day to retain an acceptable Body Mass Index. This weight loss can be attributed to a (detrimental) side effect of SCP-5939, but the subject does not complain of any discomfort if left without sustenance for what would be a dangerously long amount of time when accounting for his unique metabolism. Note; at the behest of Dr. XXX, a test was conducted to determine how long SCP-5939-1 can survive without food. Medical staff were required to intervene sixteen hours into the experiment, due to obvious visual signs of extreme malnourishment, as well as the subject passing out. Curiously, the subject did not complain about any level of hunger, and seemed unfazed by his rapidly deteriorating state of health. The medical team used an emergency IV in order to return the subject to health, and had to use a substantial amount of resources to successfully resuscitate SCP-5939-1. Thirty-two IV bags, to be precise.
When not consuming meals, the subject is usually willing to talk to any interviewing staff. He is forthcoming with information regarding his personal history, as well as how he came into contact with the SCP. Note that when interviewing, it is within accepted parameters for the subject to become suddenly dismissive of the interviewer, and talk to himself, occasionally for minutes at a time. Foundation staff have established that this directly corresponds with SCP-5939, as the subject and the SCP are 'linked' through a symbiotic relationship with one another, and communicate in a mental capacity. When asked questions regarding specific details about SCP-5939, the subject tends to become aloof and often answers with questions. It has been known that he gives false information regarding the SCP, or declines to answer at all, demanding a new question. Co-operation in this regard has proven difficult, and Foundation staff believes this stems from the subject's protective instinct regarding the SCP. They have shared a close bond for a long amount of time, so it doesn't seem unlikely that the two have become 'friends' in some perverted regard.
Over the years, and after countless hours of interviews, there have been enough scraps of information given to staff to piece together a rudimentary profile of the nature and abilities of the SCP, as well as a detailed report on how the subject and SCP-5939 came into contact with one another.
Firstly, SCP-5939 shows all the outward signs of being nothing but a voice in SCP-5939-1's head. On further inspection, staff have discovered that the SCP is a sentient symbiotic organism of unknown origin. Upon locating a suitable host, the SCP somehow bonds with the subject at a molecular level. Blood tests from SCP-5939-1 have confirmed innumerable abnormal microscopic entities. Any attempt of further study of these entities has proven ineffective, as they disintegrate within moments of retrieval. Attempts have been made to cryogenically freeze samples of the subjects blood for analysis (this was how the microscopic organisms were discovered), but the entities degrade over the course of three minutes, regardless of the manner in which they are stored.
Secondly, SCP-5939, colloquially labelled the 'Symbiote', appears to have several beneficial properties to the subject. Though he has been held in containment for twenty-one years, SCP-5939-1 hasn't aged since retrieval. He doesn't contract any diseases (proven beyond doubt when a lethal dose of smallpox was injected into his system several months after initial containment, with no effect on the subject whatsoever), nor does he require sleep. The subject explained that "this seemed detrimental at first, but it allowed (him) to do so much more with (his) time before being captured". It has also been observed that his intellect only seems to grow, and he never forgets something he has heard or seen. When asked to prove this, the subject proceeded to write down the entirety of Shakespeare's 'Romeo and Juliet', 'Othello' and 'Macbeth', word for word, without error.
This, coupled with his apparent immortality, as well as his lack of any need for sleep, has allowed him to perform any test or exercise required of him in record time.
The most obvious drawback of SCP-5939 is the apparent endless need for sustenance. The subject once likened his stomach to a nuclear reactor - always in need of a constant fuel source. Tests have shown that the subject is able to consume any item of food given to him, regardless of quality of food or established dietary boundaries of the average human being. As long as the calorie intake is sufficiently high, the subject has been shown to eat unusually hazardous materials. Including, but not limited to; mouldy or otherwise expired food (note that the subject did express displeasure at having to consume such materials, though this is thought to be due to a general disgust of the appearance and smell of the food, rather than any inability to consume), food infected by several deadly diseases (including but not limited to; salmonella, norovirus, clostridium perfringens and E. coli), poisoned food, raw meat, and human flesh (this particular test was not disclosed to SCP-5939-1, and was disguised as a well-done steak. When the subject complained of the taste and flavour, it was explained that he was eating ostrich meat. The subject seemed satisfied with the answer, and asked for more after he had finished the entirety of the meal. The request was denied).
SCP-5939-1 has been more than happy to recount how he first encountered SCP-5939. Although he classifies the encounter as their first 'meeting'. The subject has told the story in the same course of events in the dozens of times he has been asked to disclose the details of the encounter. Therefore, Foundation staff have determined him to be telling the truth. An audio log and corresponding transcript of one of these recounts has been attached below. Level-4 and above staff are permitted to access the file. Any unauthorised access to this log is grounds for immediate termination.
Addendum #1
Audio/Visual Recording between Dr. XXXX and SCP-5939-1
[Begin Log]
5939-1
Mornin', Doc. Ain't seen you around before, you one of the new guys?
DOCTOR
New enough, I suppose. I'll be asking the questions today, if you don't mind. I'll try not to take up too much of your time. Shall we begin?
[silence]
[silence]
DOCTOR
Did you hear-
5939-1
He doesn't like you.
DOCTOR
I'm sorry?
5939-1
Forget it. Let's get this over with.
DOCTOR
Uh, okay. Anyway, the Foundation were hoping you could shed some light on your own life before you first encountered 5939.
[silence]
5939-1
Alright, calm down, I'll tell him. Yeah, he doesn't like that.
DOCTOR
Doesn't like what?
5939-1
That number. I don't like it, either, if I'm honest with you.
DOCTOR
Uh… I don't…
5939-1
It's too formal. This ain't a fancy dinner, Doc. No need for that.
DOCTOR
Alright. What would he rather-
5939-1
Symbiote.
[silence, notes being scribbled]
DOCTOR
Thank you. That's very helpful. Now, could you tell me a little more about yourself before you met… the Symbiote?
5939-1
Sure. There's a lot to cover though, what do you wanna know?
[silence]
DOCTOR
Well, let's begin with who you were. What kind of person were you?
5939-1
That's tough one, mate. What kind of person is anyone? We're all doin' our best. Don't be a dick, eat well, wear a seatbelt. Shit - I could ask you the same thing.
DOCTOR
Tell me; would you categorise yourself as a good man?
5939-1
Maybe. That's an awful big question, Doc. I think-
DOCTOR
It's a 'yes' or 'no' answer. That's all.
[silence]
[5939-1 laughs suddenly]
DOCTOR
Another of your private conversations, I assume?
5939-1
He really doesn't like you, buddy.
DOCTOR
What did he say?
5939-1
Trust me, you don't wanna know.
DOCTOR
Secrets don't make friends.
5939-1
[amused chuckle] He thinks your mother has a… 'special' relationship with her pet dog, if you know what I mean.
DOCTOR
[deep sigh] Let's move on, shall we?
5939-1
Nah, it's alright. He doesn't like a lot of people. Don't feel too offended. Can you repeat the question?
DOCTOR
If you insist. Let's see… ah, yes. Do you think of yourself as a good man?
5939-1
No.
[Three seconds of silence]
DOCTOR
Please elaborate.
[Five seconds of silence]
DOCTOR
Need I remind you that refusing to co-operate will result in punishment?
5939-1
I was a fuck-up before I met him. I hated the world. My life was going nowhere. I floated from job to job, couldn't help it. Disagreed with folks, violently sometimes. Started drinking, doing drugs. You know, the usual. I tried to go straight, but… huh, you know what they say about old habits, Doc. So, no, I wasn't a good man. But I was trying to do the right thing.
DOCTOR
"The right thing". Can you tell me more about that?
5939-1
I don't know. Like I said, I hated the world. Hated people, most of all. Everyone always had something to say to me. Wasn't ever anything nice. And Mum always said, 'if you ain't got nothin' nice to say, don't say anything at all'. I think she did anyway. I don't really remember her any more. So if someone started chatting shit about me, I'd teach them to keep their mouth shut, the easy way or the hard way. So… I got into fights, didn't care with who. I'd like to say I gave as good as I got, but I didn't know anything about hitting without getting hit back in those days. Got arrested a few times, and once my jobs found out, they'd let me go. So that meant I had too much free time, too much anger in me, and a short fuse.
[silence]
DOCTOR
Go on.
5939-1
So one night, I go out and get fucking hammered. And when I get drunk, I get even more angry. I start a fight in a bar, it gets ugly. Next thing I know I'm in a back alley, on the ground, getting the living spit beaten out of me by five guys who're all twice my size.
DOCTOR
And that's when you first encountered SCP-5939?
5939-1
Yeah. I don't know how it happened. One moment, I'm tasting my own blood, beaten black and blue. I keep on thinking that I'm about to die, but I know that I have to get back up. Show those fuckers who's boss, but I couldn't. And that made me really angry. The next moment, everything goes black, but I knew my eyes were still open. I wanted to see my death coming. But it's like the night, just folded in on me? It's hard to explain. But all of a sudden, I felt strong. Really strong. So strong that it scared me. And suddenly it's me who's beating the shit out of them, not the other way around. And when it's all over, I felt different. I felt clean. The weirdest thing was that I didn't feel angry anymore…
DOCTOR
What did you feel?
5939-1
Powerful. And… hungry. And that never went away. I was a new man that night. A better one.
DOCTOR
Would you say you were a good man after the encounter?
5939-1
It didn't matter anymore. I didn't drink or do drugs after that. And it wasn't hard to resist. Like, people who go cold turkey talk about the temptation, right? But it never bothered me. It was like I just decided to be better, and I was. Everything I am now, I owe to him.
DOCTOR
And, speaking of the Symbiote, can you tell us a bit more about him? Where does he come from?
5939-1
Oh, Doc. Why've we gotta talk about other people? [chuckles] I thought we had a real connection.
DOCTOR
Answer the question, please.
5939-1
Straight to the point. I like that. You don't strike me as the kind of guy who's into foreplay, anyway.
DOCTOR
Last chance.
5939-1
Tell you what. If I tell you his big secret, will you fuck off?
[silence]
DOCTOR
The Foundation still has more questions.
5939-1
I don't care. Last chance, Doc. Going once, going twice…
DOCTOR
Very well.
5939-1
He's not from around here.
DOCTOR
What do you mean?
5939-1
He says he's on a mission. That he's got a final purpose.
DOCTOR
A 'final' purpose? Did he have purposes before?
5939-1
Of course. He found me, didn't he? I was his soul-mate. We were brought together by fate.
DOCTOR
[scribbling notes] And has he told you the nature of this 'final purpose'?
5939-1
Of course. But I don't see any reason to share it with you. Neither does he.
DOCTOR
Give me something, at least.
[approximately ten seconds of 5939-1 muttering to himself, then three seconds of silence]
5939-1
He says he's here to learn. He's here to prepare.
DOCTOR
Prepare for what?
5939-1
The End of It All. He's waiting for the final seal to break.
DOCTOR
Seal?
5939-1
He says it's only a matter of time. He wants to watch the world burn. That's why we came here. Willingly.
DOCTOR
What do you mean?
5939-1
This is gonna be ground zero, buddy. He wants a front-row seat.
[over the intercom]
DOCTOR XXXXX
This line of questioning is discontinued. The interview is over.
END LOG
Following this interview, Dr. XXX was given high-grade amnesiacs and relocated to a different Foundation Site. Both Security Agents on duty at the time of the interview were given the same security measures, though they were permitted to remain on-site.
