|Full Name||Mary O|
|First Appearance||Super Mario Maker (2015)|
Mary O, known as Mashiko in Europe and Japan, is a minor character in the Super Mario series; debuting as the guide of Super Mario Maker's manual. Aside from appearing throughout the game's manual, she also provides the player tips through the game's menu.
Mary O appears as a starting driver in Mario Kart Hypercube. She is a shallow-weight character.
- "Mary O" is a deliberate pun on "Mario".