SCP-451 appeared at Site-19, one month after he was declared MIA following a failed attempt to retrieve a dangerous artifact. The actions of SCP-451 were found to be consistent with stress responses indicated in Agent J 's psychological profile.

SCP-451, also known as Mister Lonely, is a character in the SCP Foundation series. He was an agent working for the Foundation before being affected by an anomaly and becoming unable to perceive other individuals. Due to this he became a Euclid-class SCP and currently roams aimlessly around Site-19.

Oct 22, 2022 · Document 451-A: Contents of SCP-451's Journal. 06/05/20 : It's been a month since everyone in the world disappeared. I should have never touched [REDACTED]. I should have called for backup. At the least, someone else would be to blame for killing off the human race. I'm in right now, the last town before I reach Site 19.

SCP-451, formerly Agent M. J., is a Caucasian male, 33 years of age. SCP-451 cannot perceive the presence or actions of other human beings. Changes made to the immediate environment are...

At one point, SCP-451 attempted to shoot himself in the mouth. The bullet harmlessly passed through him and fatally hit a nearby researcher. The two were able to briefly talk before the researcher died, disappearing without a trace.

Item #: SCP-451. Object Class: Euclid. Laconic Containment Procedures: No containment is necessary. Laconic Description: SCP-451 is a former foundation field agent who is now unable to perceive the presence of humans. They also cannot die.

Aug 14, 2022 · Certain changes to SCP-451's surroundings are misinterpreted, including all attempts to communicate with him and any clear evidence of direct human intervention. Study may be necessary to determine a pattern in what is perceived and what is not.

Aug 28, 2012 · Personnel entering the cell, or attempting to study or use SCP-451 should wear fire resistant clothing. SCP-451 should be ignited at least once every 33 days. Description: SCP-451 appears to be a standard wood match. The object is apparently made of simple pine with a standard wax/sulfur match head.

자신에게 총을 쏘니 총탄은 그를 통과해서 근처에서 그를 감시하던 애먼 연구원이 대신 맞고 사망하는 사고가 있었고, 게다가 인간과의 접촉만 불가능할 뿐 scp들과는 제한적으로나마 접촉이 가능한 상황인데 자신 빼고 인간이 아무도 남지 않았다고 생각하고 ...

Mar 12, 2019 · 事故451-1：在07/08/20 ，SCP-451发现了一把Site-19人员留给他的枪。SCP-451进入了主休息室，把枪口对准嘴里开枪。子弹从他身体里穿过，没有造成任何伤害，然后射中了一个二级研究员。研究员随后短暂地获得了与SCP-451交流的能力。