This sounds AWESOME, @Alex_Amberblast1! Thanks for wanting to include me!
For the outfit, my signature is the Coat Tails Suit in the original pink and dark blue. I really like this outfit's design, except for the ultra-poofy sleeves and the gloves. Do you think you could amend those to look more like the design of the Dashing Daywear? Here are the necessary pictures.
Coat Tails Suit (I like everything about this except for the gloves and sleeves):
Dashing Daywear (I like the gloves and sleeves of this outfit better):
If you were to make that modification, the white sleeves of the Dashing Daywear would be the same pink as the sleeves of the Coat Tails Suit. The half-gloves would be the same blue as in the Coat Tails Suit, too.
Oh, and if you think a mask would be a good addition, this is the one I would choose:
Ariella has seaflower-green eyes, bright orange hair pulled up in a high bun, and sideswept bangs. She is about 5'8", with freckles and a pinkish skin tone. She often smirks, but otherwise would resemble the girl in the picture below (which I found online):
For the pose, I think she would be standing up, holding a fancy teacup in this manner:
I hope that wasn't too much detail. As an artist, I know commissions can be made difficult when there is too much or too little detail provided. If you need to scrap any of these ideas to make it easier, I don't mind in the least.
I can't wait to see the finished product!
The Old Mount would be a great spot. It has my vote!