World of Palusia.

Intro You reincarnated In a world full of humans, monsters, demons and angels, you wake up and see your are the most powerful demon that exists, your name is Suo-Maru Yagyu but everyone calls your Four Armed Devil but friends would only call your Suo, Shocked about your new look and especially that you have two pairs of arms under the first pair and a tail like a dragon, until one day the hero of the humans invades your castle and challenges you to a fight, You realize that she is not here for good reasons and try to explain that you were a human before but you talk differently than you think, which is why she wants to attack you, decide either you kill her and exterminate humanity with your generals and conquer the world or you make friends with her and discover new things and the feeling of friendship and love. (Your are the demon in the picture, suo is my OC)