The mascot character for Nissin's DonbeiKitsuneUdon, combining the product's name with kitsune. Originally debuted in 2017 in live-action commercials, where the character was played by Yoshioka Riho until 2022 (after which point an animated version designed by Mika Pikazo replaced her). The mascot character can be depicted in many ways (including through existing characters, ala Sephiroth), but on Danbooru, it is popularly used to refer to Yoshioka, and one of two kimono-wearing fox girls who appeared in animated commercials from 2022 (post #5789807 and post #5837771).
