I don't think this is heterochromia so much as a pale dead eye. Notice how it's not focusing in the same direction as the normal one.

CakeMaster said:

I don't think this is heterochromia so much as a pale dead eye. Notice how it's not focusing in the same direction as the normal one.

Actually,that is her search light. It has the same concept as Furutaka's search light.

She covered it because it got damages just like how Tenryu also covered her search light.