The robes worn by students of the Mahoutokoro school of magic are described as ornate and enchanted. A single set of robes is issued to each student upon their arrival, and thanks to a powerful enchantment, the robes grow in size along with the wearer. This magical property allows a student to wear the same set of robes throughout their entire magical education (Pottermore). The most notable feature of these robes is their ability to change color, which serves as a visible indicator of the student's magical learning and moral standing. When a student first receives their robes, they are a faint pink color (Pottermore).
The Mahoutokoro Robes possess two primary magical properties that are deeply integrated into the school's culture and honor system.
The specific origin and creator of the Mahoutokoro Robes are unknown. However, they are a long-standing and integral tradition of the Mahoutokoro school, reflecting the institution's emphasis on academic prowess and a strict code of honor (Pottermore).
The Mahoutokoro Robes do not appear in the original seven *Harry Potter* novels. Their existence expands the lore of the global wizarding community, providing insight into the culture, values, and educational system of the Japanese wizarding school, Mahoutokoro. They highlight a different approach to school life compared to Hogwarts, where achievement and disgrace are made publicly visible through a student's attire.
All known information about the Mahoutokoro Robes comes exclusively from J.K. Rowling's writings on the Pottermore (now Wizarding World) website, specifically in the section detailing the various wizarding schools around the world. They are not mentioned in the books, films, or video games (Pottermore).