I once played a Fighter who was a pacifist. Not a "I attack nonlethally" pacifist, a full-on, specialized-in-weapons-he-refused-to-use pacifist.
His only kill was a Roving Mauler. He made the mistake of trying to grapple with it to restrain it from hurting the party, and as it tried to run away, the curious rolling gait of the Mauler caused it to twist its own head off in his arms, leaving the legs cartwheeling across the room while he cradled the Mauler's head and the attached collar.
RIP Maxwell, you were some bizarre wizard's beloved pet. ๐ญ