On the comment forum in Japan, the previous collaboration between the franchise of Kimetsu no Yaiba you Bandai Fashion, which launched “official underwear” based on the characters in the series. The product in question is based on the character Tanjiro Kamado, Nezuko Kamado you Shinobu Kochobut since it’s underwear, just Shinobu Kochowhich “Insect Pillar“, will be considered official. It is for this last reason that Japanese fans have come to the conclusion that their underwear is always purple.
Of course, this isn’t “official” data, but the conclusion that fans of the franchise reached when they found out about the collaboration. After all, there are no official illustrations confirming the data, except for those made by Koyoharu Gotougebut it’s black and white.

Synopsis of Kimetsu no Yaiba
In the Taisho era in Japan, Tanjirou Kamado is a kind and intelligent boy who lives with his family in the mountains. Tanjirou has become the head of his family after his father’s death, making constant trips to the village at the foot of the mountain to sell firewood and charcoal. However, his life changes when one day, returns home after spending the night outside. , he found that his family had been killed by demons.
Tanjirou and his sister Nezuko are the only survivors now, but he has turned into a demon, though surprisingly he still shows emotion and seems to have some sense. After meeting Giyuu Tomioka, a demon hunter; tanjiro He decides to become a demon hunter to hunt down his family’s killers and find a way to return Nezuko to normal.
Fuentes: Bandai Fashion
© Gotoge Hu Shiharu (author) / SHUEISHA Shueisha
Source : somoskudasai.com