I found independent component references identifying KC102K as a capacitor, including examples where it is specified as 1 nF, 250/400 V.
The physical size isn't necessarily evidence against it being ceramic. These are likely high-voltage ceramic disc capacitors, where the relatively large body is useful for achieving the required voltage rating.
For the yellow component, the marking appears to be something along the lines of 560-2 / 565-1L2. That one is harder to identify conclusively from the photograph alone. The shape and construction are consistent with a ceramic disc capacitor, but I'd want the exact marking and, ideally, a capacitance measurement to identify its value and voltage rating confidently.
Why they aren't likely to be MOVs?
An MOV normally has a voltage designation/part number associated with its varistor voltage, and its construction/markings are different. More importantly, KC102K is documented as a high-voltage capacitor designation, not a varistor.
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