Mayor Aria is purple with small metallic heels. She appears to be wearing some type of suit or dress by the shape of her armor. She seems taller than average 'bots but it's usualy because of a fan shaped crown on her head that makes her appear taller.
Not to mention she looks strikingly similar to Tamaki, the Pirate Bot.
She's been seen in several episodes.
As far as it appears, Mayor Aria doesn't have any bot-mods. At least, none that she uses on-screen.