Speaking to Alan today I took a minor detour on rigging Four to work on her eye. I want ot try something less human-looking so to start with I experimented with a few eye forms. Currently I like 2 and 6, Speaking with Phil and asking Alan for help in how to install one, I also implemented the idea of a nictitating membrane. A third eyelid that some animals possess to protect their eyes. In Four's case, it would be used to allow her to see while swimming in water.
A texture still needs to be applied but the mechanics for the membrane currently work.
I plan to rework the geometry of the eye at some point but at the moment that is a secondary priority to finishing off the skinning process, which is almost halfway done.