Eon (or 3.ON - The 3rd Generation Operational Neurodroid) is an experimental project from a far off parallel timeline that is aimed at bringing peace to the chaos being brought across the Multiverse, however, his creators have set out Marshall and Surge as targets that are threatening the stability of the multiverse. Upon arrival in the main timeline, Eon is initially hostile to our heroes until Opal's bravery proves to be the turning point. Over time, Opal and Eon develop a very close relationship; Opal will spend many days and nights working on improvements for the Cyborg, while Eon tries his best to learn to be more personal so that he can be a better protector for her as well as serving as a good teammate to Marshall and Surge as they continue to try and defend the multiverse from whatever threat may leer it's ugly head.

Voices do not have to be Robot-ized as I haven't narrowed down the right sound yet, but if you want a try, then I will allow it, but it may affect how I view your audition.