Catchphrase: "Who needs spells when I can dazzle ya with what's right up my sleeve?"
Mari is an UTAU with two voices: ADULT and YOUNG. She is a magician who possesses the ability to shift back and forth ten years in time. However, this comes at the price of never aging: though some may see this as a blessing, Mari sees it as a curse.

PROFILE - ADULT
- Western Name: Mari Sedaine
- Eastern Name: 世代音万里
- Kana Pronunciation: せだいね・まり
- Gender: Female
- Weight: Private
- Height: 5'8" (173cm)
- Age: 22
- DOB: ?
- Nationality: Japanese, though has French roots
- Occupation: Magician
- Character Item: Classic Magician's Wand, Playing Cards
- Likes: Magic tricks, clocks, pastries
- Dislikes: Bananas, hot weather
- Personality: Up to interpretation

PROFILE - YOUNG
- Western Name: Mari Sedaine
- Eastern Name: 世代音万里
- Kana Pronunciation: せだいね・まり
- Gender: Female
- Weight: Private
- Height: 5'0" (152cm)
- Age: 12
- DOB: ?
- Nationality: Japanese, though has French roots
- Occupation: Magician's Apprentice
- Character Item: Classic Magician's Wand, Playing Cards
- Likes: Magic tricks, clocks, pastries
- Dislikes: Bananas, hot weather
- Personality: Up to interpretation

Sedaine Mari (世代音万里) by the Sedaine Mari Project is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Permissions beyond the scope of this license may be available at http://sedainemariproject.weebly.com/terms-of-use.html