"M"

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Physical Appearance
UNKNOWN! 'M' hasn't been unmasked yet...

They always wear a black hoodie, black gloves, and a mask.

Who do you think it is?

Personality
'M' is shown to have a 'killer'-personality.

'M' leaves messages for people - usually threatening in some way. These messages are through texts, calls, letters, etc.

'M' threatens, gathers people and evidence, and has the ability to hurt (and possibly kill) others.