Mayoi Katase

About
Mayoi is a junior high schooler. She is also in the same class as Io, Tsumiki, Hime and Sakaki. She is always interested in technology.

Appearance
Mayoi's eyes aren't really shown because of her fringe. She has bright orange coloured hair and always ties her hair into 2 buns with a white elastic. Mayoi is also always seen wearing a white lab coat along with her school uniform whenever going to school. Mayoi also has small bits of hair covering most of her ears.

Personality
Mayoi can sometimes be very sneaky when planning anything to bug the relationship between Io Otonashi and Tsumiki Miniwa. She always works together with Sakaki Inui to plan these pranks. Mayoi is considered to be very savvy with technology. She is great at fixing technology or inventing monstrous types of devices like the Snowball gun shown in one of the episodes. But overall, Mayoi has a friendly characteristic.

Relationships
Tsumiki is one of Mayoi's classmates at school. Mayoi usually targets Tsumiki because of her closely with Io. Sakaki is usually referred to as 'partner' because he usually together with Mayoi planning. All classmates, teachers and friends.
 * Tsumiki Miniwa
 * Sakaki Inui
 * Everyone else