The Bestiary 2 refers to these golems as “walking alchemical nightmares.” Any encounter with them should play this up. Most other golems are austere clay, stone, and metal statues. Alchemical golems, in contrast, should be played as whirring, clicking, oozing, spurting, sparking, exploding, surgical tool-wielding, bomb-throwing abominations.
Alisaire (LG female half-elf rogue 2/paladin 5) and Ferges (CG male half-elf rogue 1/alchemist 6) are twins who have been each other’s only friends in a society that loathes their kind. Having found their deceased father’s lab may drive them apart, however. Ferges has become obsessed with his inheritance—an alchemical golem that occupies ever more of his attention…and which may need a new brain soon.
Away speaking at Parliament, Chem’s master insists by letter that alchemical golems have no souls or consciousness—elemental spirits animate the body, with the brain simply providing a shortcut for senses like sight and hearing. He dismisses Chem’s claim that his alchemical golem looks despondent, or that it tattoos messages for help on the lab’s rats with its terrible syringe needled-fingers.
A strange duergar foundry has gone unused for at least a decade. Unused by dwarfs that is—the bellows still pump, the blast furnace still smelts, and the elemental spirit traps still ensnare, allowing the lone alchemical golem left manning the foundry to replicate itself many times over.
—Pathfinder Bestiary 2 135