[[Image:{{Infobox/Character/Start | image name = Mayumi.jpg |thumbimage size = 230px |leftimage caption = Mayumi}}{{Infobox/Character/ExtendedName | kanji = | romanji = }}{{Infobox/Character/Appears | anime debut = [[Yu-Gi-Oh! First Series - Episode 010]] |200pxappears in = [[Yu-Gi-Oh! first series anime|MayumiYu-Gi-Oh! (first series anime)]] }} | gender = female}}{{Infobox/Character/Voice | japanese = {{voice actors|ja|Yuko Sumitomo}}}}{{Infobox/Character/End}} '''Mayumi''' is a girl who wants to give a love letter to [[Katsuya Jonouchi|Jonouchi]]. She asked [[Anzu Mazaki|Anzu]] and [[Miho Nosaka|Miho]] about him and they questioned her liking in Jonouchi. Still, they asked [[Yugi Mutou|Yugi]] for help seeing as Yugi was Jonouchi's friend. Yugi took them to his grandfather's game shop and his grandfather, [[Sugoroku Mutou|Sugoroku]] gave them a blank puzzle, telling Mayumi she could write a message on it and give it to Jonouchi to figure out. He also stated it was how he got Yugi's grandmother to like him.
Later, Mayumi slips the present into Jonouchi's desk when they get to class. But when Jonouchi finds it, the teacher [[Ms. Chono]], takes it and says she will figure it out, then read the message. Anzu stands up and says that Ms. Chono shouldn't be reading other people's messages and says she was the one who gave Jonouchi the gift.
Later, Jonouchi asks Anzu why she gave him the love letter puzzle. Anzu claims it was a joke. Mayumi later tells Anzu and Miho she is no longer interested in Jonouchi after how she saw how he treated her gift earlier.
She is voiced by Yuko Sumitomo.
{{Characters}}
[[Category:Yu-Gi-Oh! characters]]
