Okay so like, a giant mecha (talking like 15 storeys tall) with this energy exhaust/shield/not sure for hair, down to the waist. The mecha houses a sentient and ancient AI, and can pilot itself, but having a pilot is somehow an advantage (not sure why). So the pilot does not use the mecha, they serve it. The two form a bond, a relationship, as long as the pilot shares the mecha's goals and works towards them.
Very inspired by the Divines from COUNTER/Weight.