Mika Kukuri is a high school student in Tajimi, a city famed for its pottery tradition. She sports blonde hair styled in a ponytail featuring a small front braid, striking red eyes, and round orange glasses. Her consistent attire is her school uniform: a green skirt, light yellow cardigan, and a large orange bow.

Radiating cheerfulness, Mika exhibits an outgoing, bubbly personality marked by optimism and infectious enthusiasm. An extrovert, she instantly connects with others, like energetically inviting Himeno Toyokawa to join the pottery club moments after meeting her. She openly shares her passions and forms quick bonds, though her spirited, sometimes air-headed nature can lead to boundary-blurring moments, such as spontaneously proposing marriage to Himeno. Beneath this exuberance lies genuine knowledge and skill in pottery.

Within the pottery club, Mika serves as the mood-maker, fostering a lively atmosphere. She shares a notably strong bond with the serious club president, Toko Aoki; their contrasting personalities create a dynamic of mutual respect and collaboration. Mika consistently demonstrates care and support for all club members, cultivating a fun, inclusive environment.

Her creative approach to pottery subtly influences peers; Himeno, for instance, found inspiration for a ceramic cushion design while braiding Mika's hair during a club session. Mika's surname, Kukuri, combines "long time" and "pear," while her given name, Mika, means "three" and "flower." Her core traits of high energy, social adeptness, and deep engagement with pottery remain consistent across both seasons of the anime and the manga. She does not appear in the spin-off ONA "Rokurō no Dai Bōken."