yokefellow

I’ll see their trial first. Bring in their evidence. / [To Edgar] Thou, robed man of justice, take thy place. / [To the Fool] And thou, his yokefellow of equity, / Bench by his side.

[H]is industrious yoke-fellow executed every circumstance of the plan she had projected; so that, when he recovered his vision, he was an utter stranger in his own house.