Chiemi Honda is a central figure in the narrative of King's Game The Animation, primarily known as the late girlfriend of the protagonist, Nobuaki Kanazawa. Her background reveals a tragic connection to the origins of the deadly game itself. She is established as the twin sister of Natsuko Honda, who becomes the main antagonist of the animated series, and the daughter of Kazunari Honda, the survivor of a previous King's Game. This familial link places her at the heart of the curse that plagues the series' characters.

In terms of appearance, Chiemi is depicted as a young high school student with long, black hair typically tied up in a high, loose ponytail using an orange scrunchie. She has blue eyes and is most often seen in her school uniform, which consists of a white blouse, a red bow, a blue plaid skirt, and navy knee-high socks. Her casual attire is described as a green sweater worn with leggings.

Personality-wise, Chiemi is portrayed as a sweet, caring, and deeply devoted individual. Her most defining characteristic is her unwavering love and concern for her boyfriend, Nobuaki. The thought of him being in danger causes her great distress, and she is consistently motivated by a powerful desire to protect him at any cost. This selflessness defines her actions throughout her time in the King's Game, as she demonstrates a willingness to undergo extreme humiliation or even sacrifice her own life if it means ensuring his survival.

Her primary role in the story is as a tragic figure whose fate serves as a crucial piece of backstory and a driving motivation for Nobuaki. The events she endures in the King's Game, which occurred before the start of the anime, have already concluded by the time the series begins. Her key relationship is undoubtedly with Nobuaki, and her love for him is the primary engine of her character development. In a moment of profound sacrifice, when the King issued a final order for the players to kill the person they loved the most, Chiemi chose to kill herself by stabbing herself in the chest, allowing Nobuaki to live. This act highlights her complete devotion and solidifies her role as a martyr. Beyond her connection to Nobuaki, her relationship with her twin sister, Natsuko, is a significant, though often off-screen, aspect of her background. While she does not possess any supernatural or physical abilities that set her apart in a combat sense, her notable strength lies in her profound emotional resolve and her willingness to make the ultimate sacrifice for the one she loves.