Complex sentence: She has red eyes and long silver hair; but her most distinct feature being a black eyepatch covering her glowing-yellow left eye, the result of a failed nano-machine experiment meant to help her pilot an IS better.
Split into simpler sentences: She has red eyes and long silver hair, her most distinct feature being a black eye patch covering her left eye. Her left eye glows yellow, the result of a failed nano-machine experiment that was meant to help her pilot an IS better.