* Do not edit this page without Alphasaith's permission.

Monster Kid or MK is a child monster that lives in Snowdin town in the Underground.


At an early age, MK had a very obsessive personality that made him obsess over certain people. As MK spent time on the surface, and through the process of growing up, they eventually overcame this personality disorder.

Backstory (Leading up to Surfaced Arc)



Onyx Extinction Event


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