月兎フェルミ
Pronunciation(and meaning): Tsukito fermi(moon rabbit + fermi paradox)
Gender: at least 3
Age: about -2.9999999 billion years 
Height:20cm(true form) 157cm(human form)
Weight: somewhere between an electron and a neutron star
Birthday: some day 3 billion years into the future
Personality: friendly and "not the sharpest tool in the shed"
likes: humans, human culture, carbonated drinks, photography
dislikes: dogs(her real voice is like a dog whistle so she gets barked at a lot)

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An alien from a distant moon of another galaxy.
The frequency of its voice is too high for humans to hear, so 
they repurposed speaker parts from a broken down space probe robot so that their voice could be heard by humans.