Her name is Azalea "Asmodea" Arialys (originally, in french, Azalée "Asmodée" Arialys) and she is a beautiful and noble unicorn and her appearance is full of grace. However, she's a skillful politician and a powerful sorceress and as such, she's cunning, level-headed, passionnate and quite frightening when she is angry. She is also have the pseudonym of Silver Fireflies Lady. and Countess.
The most peculiar thing about this unicorn is how strange she can act for the common mortals. She is a lover of dramatic act and she loves orchestrating all of her plans in order for it to be the more spectacular. For example, she could force a duel between her victim and her to show her mercy but in the end, just lead the pony to a splendid death/defeat. She fears boredom and and feels a deep disgust with the unspectacular and hidden habits of politician, so she wants to see the world working as she wants to, being like the dramatic and epic legends she loves so much and where the feelings are at their highest. She also has no respect for those she doesn't acknowledge whether they are emperors, kings or just bards doesn't matter.
She does have influence, wealth and strength (magical power) and her arrogance and sassiness is pretty intriguing. At this point, you may think she is insane and to a certain degree she is. But she is in absolute control of her actions and she's more close to a mad genius. She is a beautiful anomaly.
Physically speaking, she is a pretty average-size mare with a a dark purple robe and a beautiful, long, silky and shiny black mane and tail. Her mane is arranged in a flower french braid manner and during parties, her tail is french braided more classicaly and she does have strangely uncommon silver irises as well as a star-shaped pale scar on her abdomen near the heart.
As childish her behavior can seem (her love for dramatic spectacle and impressive feat for a willing or not audience, the way she behaves with the ones she loves, the fact that she does love cookies, etc.) she does have signature objects and a signature phrase, them being :
A long silver smoking pipe.
A silver gem-incrusted firefly brooch
and her favorite sentence is, when she leaves her audience with a smile or when she is insulted by a defeated enemy, "You can call me Countess".
Now for the explanation : the long silver pipe is a memento from her late mother (it is also a living entity but I won't dwell on that) and I do think it gives her a certain charm (and yes she does smoke, pretty dramatically with that.) For the Countess part, this is the highest title in Unicorn society (just below Member of the Stellar Council), even though she loves using it just to shock the spectators and for the ring of it, she has no real attachment for nobility.
Arialys is made of two specific words : the first is Aria and does have a very different meaning here than originally. The Aria is the very source of magic in my universe, it flows in the earth, spread in the air and gathers in a few physical or abstract areas called Power Wells. The mythical river of Aria is also the world where the souls of the deceased goes in order to be in peace and to make the cycle of magic flows well. Everything is magic.
This magical material can be liquified (it is a very hard process and consumes a high amount of power) and looks like liquid mercury.
The second word is Lys, which is a very famous flower in France for being the flower of Kings and I do love the shape of the flower.
So, she does have on her right flank a tatoo where a lys flower seems to float on a river of Aria. For this part, I will let you design it and color it as you see fit.
It is an old description of her that I updated a bit but it is mostly relevant.