Ynnisis

Ynnisis (pronounced 'Genesis') is a female Demon tasked as ambassador between the Demon kingdom and the government of Earth, albeit in no significant, official capacity. Sent by certain moderate (but still otherwise aggressive and immoral by most Human standards) outliers of Demon society, she wouldn't care about the job in the slightest were it not for the inkling of prestige it came with among the minor Demon nobility opposed to conflict, along with the chance to have 'fun' with any human diplomats utterly terrified of her.

Personality
Ynnisis is a generally mischievous and playful demon, though one who is at least capable of basic professionalism when the time calls for it, mostly for any particularly high-ranking representatives of Earth she has the opportunity to meet, as opposed to bean-counters and pencil-pushers she usually has to put up with.

She also has a habit of talking fondly about both her homeland (the ravaged wasteland that it is, regardless) and her people, up to and including talking about the Cataclysms as if she had experienced them herself..while simultaneously saying she's forgotten the details if sufficiently pressed about it, making her potential age amongst Demon society unclear at best.

She clearly has a bit of trouble adjusting to the human standards of diplomacy, though. Even aside from when she isn't intentionally messing with someone for kicks, she's used to a society where power is everything, and will regularly threaten people to get what she wants, or just to make a point, without realizing in the slightest that such a thing is..less than acceptable.