  We investigate the shadows of Konoplya-Zhidenko naked singularity. In the
spacetime of Konoplya-Zhidenko naked singularity, not only can unstable
retrograde light ring (LR) exist, but also unstable prograde LR, leading to the
formation of a complete photon sphere (PS). Due to the absence of an event
horizon, a dark disc-shaped shadow does not appear; instead, a ring-shaped
shadow is observed. The ring-shaped shadow appears as an infinite number of
relativistic Einstein rings in the image of the naked singularity. For some
parameter values, only the unstable retrograde LR exists, resulting in an
incomplete unstable PS and consequently giving rise to the arc-shaped shadow
for Konoplya-Zhidenko naked singularity. The shadow of Konoplya-Zhidenko naked
singularity gradually shifts to the right as the rotation parameter $a$
increases, and gradually becomes smaller as the deformation parameter $|\eta|$
increases. Moreover, the stable LRs and stable photon spherical orbits can also
exist in Konoplya-Zhidenko naked singularity spacetime, but they have no effect
on the image of the naked singularity. This study demonstrates that rotating
naked singularity can exhibit not only an arc-shaped shadow but also a
ring-shaped shadow.
