silent partner Synonyms

sleeping partner classmate dumb assistant dumb brother dumb companion dumb friend dumb friends dumb heiress dumb owners implied husband implied mate mute assistant mute brother mute brothers mute friend mute friends mute husband dumb ally dumb allies closest partner mate messmate partner teammate buddy bedmate limited partnership limited partner equity partner secret partner dormant partner laconic partner restrained partner unspoken ally behind-the-scenes supporter mute sidekick