|Voice Actor||Nozomi Sasaki|
|Fur Color||Light brown (fur)|
|Magical Ranking||Glass (JP1)|
|Partner||Nobara Kitajima (JPH)|
|Magical Item||Jewel Pod|
Io is a Holland Lop rabbit with long-furred, drooping ears and a short rabbit tail. He has purple Jewel Eyes made of cordierites. He wears a purple ribbon bowtie on his neck.
Io's charm form is cone-shaped with dark blue decor and a snowflake shape in the center. It also contains iolites, representing his jewel.
Io is often loyal but sometimes childish. He is also easy to get attracted to ladies, especially Opal. He often ends his speech with the phrase "Dachi".
He is in the background in the other seasons.
- Io's jewel motif is the cordierite, called iolite in gemology. Cordierite is a type of magnesium iron aluminium cyclosilicate used as a catalytic converter.
|Magical Red||Ruby • Garnet • Rin • Ryl • Kohaku • Titana • Sango • Nix • Alex • Brownie • Jasper • Lolip • Rosa|
|Magical Blue||Sapphie • Luna • Yuku • Aqua • Kaiya • Opal • Amelie • Lapis • Io • Topaz • Charotte • Larimar|
|Magical Green||Peridot • Chite • Prase • Rald • Flora • Tour • Milky • Nephrite • Tata • Kris • Angela|
|Magical Black||Diana • King • Dian • Labra • Coal • Granite • Luea|