Description: a mutation of SCP-173 during an examination on the structure of 173. Outer appearance seems similar to 173 in many ways except for overall body structure, which seems to appear as a schoolgirl of normal to slightly larger size than normal schoolgirls. Same Protocols are to be followed as 173, maintain eye contact with at least 3 other class-D personnel maintaining said eye contact.
Addendum █-██-███ analysis: subject seems to kill victims in a similar fashion, however further inspection of corpses has revealed no broken bones or any fatal marks. the cause of death seems to be heart attacks, this has been deduced as the only known cause from 173M, and upon further analysis 173M is about 1.37 to 1.6 meters, standing shorter than an average grown human, concluding that 173M kills its victims by hugging them from behind, causing the heart to beat uncontrollably until the victim dies of heart attack. some scientists have coined the term as "death by moe."