the.com/complainant

The person who files the paperwork so someone else has to explain themselves.

means The person who formally brings a complaint or accusation, typically in a legal or official proceeding.

from Traces back through French 'complaindre' to Late Latin 'complangere' — com- (intensive) plus 'plangere,' meaning to beat the breast, to lament loudly. The same root gives us 'plaintiff' and 'plaintive.' So underneath the legal paperwork lies an old gesture of grief — someone literally pounding their chest in protest before protest had forms to fill out.

legal role
brings the complaint, not the verdict
not always victim
can be a witness or third party
civil vs criminal
in criminal cases often called the accuser
burden shift
their claim starts the process, not ends it
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