The Headmaster is the an who was in charge of the Essex House for Mutant Rehabilitation, where tortures the mutant children including Russell Collins.


Deadpool 2

The Headmaster was in charge of the Essex House for Mutant Rehabilitation. On the surface, he was dedicated to helping troubled young mutants. In secret, however, he headed a torture facility, experimenting on young mutants, with banners proclaiming "Humankind not Mutantkind." Eventually, one of his victims, Russell Collins, got out and went on a brief rampage outside the school. This was interrupted by the X-Men with Deadpool, which soon went south when Deadpool executed one of his assistants for their role in the torture.

After Russell Collins was convinced to not kill him (which would have caused the deaths of Cable's family), the Headmaster was run over by Dopinder after making anti-mutant remarks.