Here’s a self-indulgent thing that I’ll pretend to have a good reason for
Damaged ISO, because I was talking to a few people about that earlier… Her artificial chromatophores glitch out if her outer skin is damaged, and eventually die and turn white. But a dying ISO body is often quite the little murderous lightshow.
If she loses one body, she can just make another. After all, her “real” body is the unmanned laboratory/probe she came in. She will still send something along to collect the body for recycling, so it’s not a good idea to stick around after destroying one.
The greenish fluid is coolant, present only in her torso and head.
And just for fun, an ISO on its last legs often has a rather distorted voice, like a toy with dying batteries…