Adding on- in the Mirrorverse, Garak participates as an enforcer for the human slave trade, plots to murder his commanding officer (Kira) so he can torture the slaves more, and murders a lot of prisoners in his quest for power.

Mirrorverse Worf also participates in the human slave trade. He captures mirrorverse!Garak and treats him like a literal dog (chained down with a collar) before realizing they could use each other, with both participating in the murder of the human freedom forces.