Exalted/Spirits/YMMV

The Ebon Dragon, the Shadow of All Things

 * Complete Monster: Word of God has it that letting Oblivion consume Creation would be kinder than allowing the Yozis to complete the Reclamation. The Ebon Dragon is pretty much stated to be the most evil of all of them, and the stats back him up - he has the lowest possible rating in each Virtue, and can't go to zero only because he's a sentient being.

Adorjan, the Silent Wind

 * Fanon: Adorjan's known to have fallen for Marus, the Solar who killed Lilike, and for the Solar who fathered her daughters. It's been conjectured they're one and the same, but the books haven't said.

Isidoros, the Black Boar that Twists the Skies

 * Boisterous Bruiser: Fanon has him as one of these, Affably Evil at worst.

The Dowager of the Irreverent Vulgate In Unrent Veils

 * Moral Event Horizon: She crosses this once a generation.

The Timeless Order of Manacle and Coin

 * High Octane Nightmare Fuel: You do not want them angry with you.