Denier

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A denier is a headmate who holds feelings of denial. These feelings run from denying the system, denying feelings for people, or denying identities, though they are not limited to these. They often act as masks as well to better line up with whatever they're claiming to be rather than what they're denying.

Related Terms
Denialist may be considered a synonym, specifically about denial and misdirection of other system members about trauma.

Denial abater may be considered an antonym.