Miki Saotome is a main character in the live-action tokusatsu series Cutie Honey The Live. She is an introverted and anti-social young girl who, like the protagonist Honey Kisaragi, has the Honey System installed in her body. This system allows her to transform into a blue armored form known as Sister Miki. Her transformation is triggered by shouting Honey Flash, and in this armored state her hair changes to a two-side-up style and she wields a boomerang-shaped cutter called a boomerang bull as her primary weapon.

Miki's personality is defined by a stoic and reclusive nature. She keeps to herself and struggles to connect with others, which makes her a loner. Despite this, she serves as a rival to Honey while also providing distant assistance in the fight against the criminal organization Panther Claw. Her motivations are rooted in her own circumstances as another android created by Doctor Kisaragi, and she eventually becomes one of three heroines alongside Honey and Yuki Kenmochi. Her role in the story evolves from an antagonistic figure to a reluctant ally, and finally to a key player whose powers are instrumental in the series' climax.

A notable aspect of Miki's abilities is a flaw in her power system: metallic objects are involuntarily absorbed into her body and later painfully forced out through her skin. This weakness causes her considerable suffering and sets her apart from Honey's more stable transformation. In terms of key relationships, she has a complex dynamic with Honey, initially clashing with her but later cooperating. She also receives a romantic confession from the detective Seiji Hayami, which she rejects by tearing up his letter. Her relationship with Yuki is another important bond, as the three eventually unite against a common enemy.

Over the course of the series, Miki undergoes significant development. Her flaw and isolation drive a narrative arc that leads to her eventual sacrifice or transfer of power, as her abilities are absorbed into Honey in the final battle. After this, it is implied that Miki's fighting style lives on within Honey. Overall, Miki Saotome is a multifaceted character whose introverted demeanor, flawed abilities, and pivotal role in the story make her a memorable part of Cutie Honey The Live.