((Note: Anais is a fan creation, or at least I think she is, and so your headcanons may differ))
Shortly after Annie received her immortality, Anais was created by Venus with the help of her sister, Aeon.
The reason she was created was for the fun of it
How Anais was created is known only to the Trinity
Anais enjoys having fun
What she considers fun is making trouble for others, especially Annie
She often starts rumors, and induces conflicts between nations, and every once in a while, will cause a disaster or make one worse
The two have a love hate relationship
Meaning Anais loves making Annie hate her
Despite appearances, their overall personalities are eerily similar in many ways
Anais has an Irish/Scottish Highlander accent, enjoys drinking, likes fighting to a degree, though so more than Annie.
She differs from Annie in many ways
Instead of being a swordswoman, shes a spearwoman
Her fighting style overall is entirely different from Annie.
Instead of tightly controlled swings and downward thrusts, Anais uses a style of broad wide strokes, quick jabs, and critical thrusts during openings
Her spear can morph into many different kinds of polearms, including halberd, billhooks, Nagimaki, Javelin and so on.
Honor means little to her, if she wants to win, she will resort to any tactic to do so
She inherited some traits from her creators, Venus and Aeon
She inherited Venus’s taste for clothes, wearing scarves and pink clothes
Like Aeon, she is a bit of a shut in gamer, and reads manga, and watches anime
Like both of her creators, she enjoys yaoi slash fiction and hentai
Anais is far more raunchy than Annie, and has far fewer inhibitions
For example, Anais wears thongs under her bloomers. Most of her wardrobe is like this. (Yet another trait from Venus)
Anais knows how to pole dance very well, and makes a healthy living as an ‘Exotic Dancer’, not that she needs to
She will make sex jokes and perform lewd gestures quite often
Anais has had a few boyfriends and girlfriends over the years
She hasn’t had sex with any of them, mostly because non of them were actually her type, but Annie doesn’t know that, and it drives her nuts over it
She enjoys breaking hearts too
Like Venus, she finds certain features to attractive that most people wouldn’t. She is especially fond of the disfigured, particularly if they have battlescars, or love wounds.
Anais has a limited ability to alter her appearance, and can make herself look older and more… ‘bodacious’. This is another trait given to her by her creators
Anais has a desire to dominate Annie in all things and eventually break her
Double knows about Anais, and sometimes helps her in her little games, among other things
Anais has a pet bunny named Darwin, whom she dyed pink
Like Annie, Anais has an ultimate form