The following information was originally published on Pluralpedia, and is being published here for additional archiving purposes. You can find the Pluralpedia article for this page here.
An intentional harmer is a headmate that harms other headmates. See also: persecutor.
They may believe bringing harm including, but not limited to, sexual, physical, or mental harm, is a good way of showing other headmates that the world is not good, safe, and/or happy. It may also be a way that these headmates attempt to get control in their system, or an attempt to disrupt the peace.