Complex ring element, - wherein the complex ring element has a first and a second ring (2, 3) with a respective axis, - wherein the first and the second ring (2, 3) are arranged such that their axes lie on a shared axis and the first and the second ring (2, 3) are adjacent to one another when viewed in the direction of the shared axis, - wherein the complex ring element has an additively applied connecting element, by way of which the first and the second ring (2, 3) are interconnected, - wherein the connecting element consists of metal, - wherein the connecting element in each case partially overlaps the first and the second ring (2, 3) on their respective outer peripheral surfaces (8, 9) when viewed in the direction of the shared axis, - wherein the connecting element is circumferential when viewed in the peripheral direction about the shared axis and - wherein the connecting element is manufactured by means of an additive application method, - wherein the connecting element is connected to the first ring with a material fit, - wherein the connecting element is connected to the second ring with a positive and/or non-positive fit, - wherein, on its peripheral surface, the first ring has a first contour which uses a resistance to counteract a twisting of the connecting element about the shared axis in relation to the first ring, wherein a torque can be transferred between the first ring and the connecting element, - wherein, on its peripheral surface, the second ring has a second contour which uses a resistance to counteract a twisting of the connecting element about the shared axis in relation to the second ring, wherein a torque can be transferred between the second ring and the connecting element, - wherein the first ring or the second ring is a shaft of a rotor or is connected to the shaft of the rotor, - wherein the first ring consists of metal, - wherein the second ring consists of ceramic. - wherein the complex ring element has a first and a second ring (2, 3) with a respective axis, - wherein the first and the second ring (2, 3) are arranged such that their axes lie on a shared axis and the first and the second ring (2, 3) are adjacent to one another when viewed in the direction of the shared axis, - wherein the complex ring element has an additively applied connecting element, by way of which the first and the second ring (2, 3) are interconnected, - wherein the connecting element consists of metal, - wherein the connecting element in each case partially overlaps the first and the second ring (2, 3) on their respective outer peripheral surfaces (8, 9) when viewed in the direction of the shared axis, - wherein the connecting element is circumferential when viewed in the peripheral direction about the shared axis and - wherein the connecting element is manufactured by means of an additive application method, - wherein the connecting element is connected to the first ring with a material fit, - wherein the connecting element is connected to the second ring with a positive and/or non-positive fit, - wherein, on its peripheral surface, the first ring has a first contour which uses a resistance to counteract a twisting of the connecting element about the shared axis in relation to the first ring, wherein a torque can be transferred between the first ring and the connecting element, - wherein, on its peripheral surface, the second ring has a second contour which uses a resistance to counteract a twisting of the connecting element about the shared axis in relation to the second ring, wherein a torque can be transferred between the second ring and the connecting element, - wherein the first ring or the second ring is a shaft of a rotor or is connected to the shaft of the rotor, - wherein the first ring consists of metal, - wherein the second ring consists of ceramic.