She is voiced by Stephanie Sheh.
Mayumi has been shown to be a strict and overprotective mother at times, but she is also very loving to her children, including Miko, and she still cares about them wanting the best for them too.
Miko is her middle daughter, and Mayumi loves her just like all her kids. Miko does not like how her mom is strict with her with doing something more "proactive" and how she hardly shows support for her love for video games. Despite this, they both love each other, and they became even closer after Miko started working for Hinobi.
Mayumi knows that he is a good friend of her daughter Miko and trusts him to keep her safe at all times.
Lexi is her youngest daughter and Mayumi loves her just like all her kids. She tried to cheer up Lexi by taking her to get some frosty freezes in Karate Trainer.
Nica is her older daughter and Mayumi loves her just like all her kids. Mayumi is very demanding toward her kids to get along and spent time together especially, towards Nica and Miko.
Mayumi is an older-looking Japanese woman. Her hair is short, black and straight and parted to one side. She is often seen wearing white, high-waisted pants that end beneath her knee, and a pink short-sleeved sweater.
|Glitch Techs theme song:||Absent|
|1-2. "Age of Hinobi":||Debut||6. "Castle Crawl":||Absent|
|3. "Tutorial Mode":||Absent||7. "Alpha Leader":||Absent|
|4. "Going, Going, Gauntlet!":||Appears||8. "Collection Quest":||Appears|
|5. "Smashozaurs":||Absent||9. "Adventures in Pet Training":||Absent|
|10. "Karate Trainer":||Appears|
Foreign voice actors
|Spanish (Latin America)||Alexandra Vicencio|
|— Characters —|
|Main Characters||Miko • High Five|
|Supporting Characters||Zahra • Haneesh • Nica Kubota • Mitch Williams • Casino • BITT • Phil • Lexi Kubota • Bergy • Nix • Mayumi Kubota • Hugh Kubota • Helpie • Abuela Nieves • Papi Nieves • Emilio Nieves • Ridley • Helpie • Emma Deveraux • LuC++|
|Glitches||Ally • Alpha • Bolypius • Chomp Kitty • Count Nogrog • Garbile • Karate Master • Narwhalrus • Team Enter Name • Zoid|