No crunch, just concept. Sharing because it popped into my head and I though "That sounds great! I have to share it!"
So this oracle, we'll call him Steve. Steve is deaf, blind and mute. The deafness is his curse, the other two are from (torture/going mad from the revelation/birth defect/a terrible accident/pick one). Obviously, Steve is not cut out to be an adventurer. However, lucky for Steve, he has a little bit of arcane eldritch heritage in him. Even luckier, he happens to be of the alignment and level to attract a spirit oni familiar! Most lucky of all, mask symbiosis is a thing!
The revelation doesn't really matter and I guess you could go deaf/clouded vision dual curse if you wanted. There is no mechanical benefit whatsoever to this character. It's just an interesting, mayyyyybe fun concept. (unless you convince your GM to give you goodies for the self-imposed disabilities)
tl;dr A deaf, blind, mute oracle who wears a furious little red oni as a mask and shares all it's senses when doing so.