warper

noun

agent noun of warp; one that warps

Wiktionary

noun

Etymology: Etymology tree English warp Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English warper From warp + -er.

One who, or that which, warps or twists out of shape.