Per 
Scp-4345
Object class: Safe-Euclid
Scp-4345 is comprised of two separate entities.
Scp-4345-A appears to be a young Scandinavian boy of around thirteen to sixteen years of age.
Scp-4345-B is a pendant of a unique shape and size. The pendant changes shape to be whatever symbol the wearer wants it to be. As of recording, the pendant is is the same crest as The Foundation.
SCP-4345-A wears the pendant constantly, without taking it off, and becomes distressed if it is taken off. SCP-4345's anomalous properties include immortality and complete benevolence.
It has been noticed that nothing can harm 4345-A if 4345-B is being worn, which is probably why 4178-A becomes distressed.
SCP-4345-A seems to be of average intelligence, and knows Norse, English, Saxon, and French. He seems to be very curious and very cooperative with the Foundation.
SCP-4345 was discovered by the Foundation following a raid on a Chaos Insurgancy safe house. It was discover sitting in a locked room with SCP-[DATA EXPUNGED].
While testing why 4345-A becomes distressed when the pendant is removed, it was discovered that a change comes over 4345-A,
If left separate from the pendant too long, or if someone else wears the pendant, 4345-A grows black horn-like appendages on its forehead and its hands become black claws.
4345-A becomes increasingly hostile while kept apart from the pendant.
If kept apart after transformation, 4345-A will fly into a rage and destroy everything in its path to get the pendant.
4345-A has broken through steel walls and concrete and does not appear to be able to tell what it is destroying when enraged.
Upon return of 4345-B, the subject calms down and transforms back.
Containment Procedures:
SCP-345 is to be kept in a normal-style dorm at Site-[DATA EXPUNGED]. 4345 is allowed any reading material it desires and is not to be separated unless testing. It is also allowed to interact with other SAFE class anomalies if it wishes too. It is allowed to wander the science halls whenever there is at least two guards on duty.
Addendum 4345-1
While testing why nothing can harm 4345, it was discovered that 4345's presence pacifies SCP-173.
