"You want something nice but not too fancy, it is the mardi gras after all" Delain says as she steps inside the tailors
"Then come this way please sir, I will need to take your measurements and also your ideas on what you would like your costume to be" he says, leading to the fitting rooms.
He then gets out his measuring tapes and uses his magic to write down notes "Hmm, you're the alchemist, if I am not mistaken, I would gladly buy some certain potions for you, if you would allow"
"well, it's for my..little one, you see, h-she is going through a time where she wants to be well a filly and not a colt, and I was wondering if you had any temporary sex change potions that could help her see if it is something she really wants"
"I believe I have such a transmutation recipe, yes. what address should I bring it to?" Rolir said, looking at the available materials for his costume
The tailor smiles "Excellent, well my house is just around the corner, number eight Manehatten Drive" he says, still making the measurements right, "I support her decisions, hence why I am calling her by her preferred name and gender pronouns, but I want her to experience being the opposite gender before she really makes up her mind"
"Excellent, thank you for that" he says as he finishes his measurements, "Well the measurements are all in order, what sort of costume would you like sir?"
"Hmm, well I could make you a simple skeleton type costume and I have a few nice skull type masks for you to choose from" he says thoughtfully
He smiles "The least I could do for somepony willing to help my little one with her..choices" he says leading Rolir to the section with the masks "Here we are sir, feel free to take your time in choosing, and if you do decided you didn't like what you bought, you may always exchange it for another"
he nodded, turning towards the asks and examining them. he eventually picked one out (which I don't feel like describing at this time) and bought it and the costume before returning to the main lobby to wait for Delain
Delain comes back after having her measurements taken and smiles at him "It's getting close to lunch dear, would you like to go out to eat or return to the manor?"
"oh, um...." he frowned, then shrugged. "whatever you want. although I do have to get back to the shop soon. I have a delivery for one of the employees here"