Per 
Item #: SCP-84910
Object Class: Euclid
Special Containment Procedures:
SCP-84910 is to be stored in a standard Level 4 secure item locker at Site-██. During testing, any subject wearing SCP-84910 must be monitored by at least two security personnel via live video feed.
Following removal of the mask, test subjects are to undergo immediate psychological evaluation. Individuals exposed to SCP-84910 have exhibited symptoms of identity confusion and dissociation, often continuing to believe they are the person they impersonated.
Description:
SCP-84910 is a red porcelain mask resembling a theatrical comedy mask. It features a wide, exaggerated smile and bright blue painted eyes.
When placed on the face of a human subject, SCP-84910 will adhere to the skin and initiate a transformation sequence. The wearer’s appearance, voice, and biometric signatures will immediately shift to match the individual they are actively imagining. This effect persists for the duration of wear and reverses upon removal of the mask.
Subjects frequently report confusion or psychological distress following use. In over 70% of observed cases, individuals continued to refer to themselves by the impersonated name, and some retained vocal inflection or muscle memory associated with the target identity
Mobile task force discovered SCP-84910 in a ancient Egyptian tomb.
Past test
D-class 82911 was exposed to the scp it turned into director ██ after being tested for biometrics it resembled a 99.9994 match after the mask was removed, the declass was screaming. Orders at the guards. Seemingly still believing he was the site director he had to be pacified for 24 hours after the 24 hours were over. He seemed to go back to normal behavior.