He wants "Dash and Daring Do doing some roleplay, with Dash as the villain who captured Daring… and is way too enthusiastic about her role."
So Rainbow Dash will be doing a cosplay of Doctor Caballeron for her roleplay session with Daring Do. To that, here is a thumbnail of what a female Caballeron costume would look like. Designing this took a bit. Although derpibooru has 589 images to his tag, very little of Caballeron's artwork is anthro. Worse still, there is no anthro artwork at all of that pony that did a femme Caballeron cosplay in 'stranger than fan fiction.' >>2024818 So this will be the first arthro version of that on that site. Now I just need to make it look more like Dash doing a femme Caballeron cosplay.