Mika Honjou is a Japanese high school student and the quiet best friend of protagonist Tazusa Sakurano. She designs all of Tazusa's figure skating costumes, highlighting her supportive role in Tazusa's athletic career. Mika frequently cheers for Tazusa at competitions alongside Tazusa's younger sister, Yōko Sakurano.

She has blue hair, blue eyes, and typically wears glasses and a headband. A recurring comedic element sees Mika mistake Tazusa's angry outbursts directed at the invisible ghost Pete Pumps as being aimed at her instead, leading to confusion.

Throughout the series, Mika maintains a consistent background presence. Her role focuses exclusively on providing friendship and practical costume design support to Tazusa. The narrative provides no details about her family, personal history, or evolution across other media adaptations.