|This article is about a/an mascot in Kamen Rider OOO.|
Kiyo-chan (キヨちゃん Kiyo chan) was a puppet which was regularly seen on the shoulder of Kiyoto Maki. It was originally given to him by his sister, Hitomi Maki as a surrogate for her, due to his difficulty of talking to anyone but her. It originally had hair but it was burned after Maki started a fire, he has several outfits for the doll, including a lab coat and one that makes Kiyo-chan look like him, as well as several accesories such as a tiny wardrobe and a miniature tea set. He occasionally looks at Kiyo-chan even when speaking to someone else making it look like he's speaking to the doll itself, he panics and is unable to speak properly when the puppet falls off. Though after coming to terms with his sister's true nature, he seems to have gotten over it, though still freaks out at times when Kiyo-chan was removed from the position Maki put him in. Since Maki absorbed the purple Medals, Kiyo-chan has been shown in increasingly jarring poses and actions, even once channeling the same Greeed powers as Maki himself, implying some level of sentience.
In other media
These movies, which were shown during the run of OOO, take place within a version of the TV series' timeline. However, there are some contradictions between story elements, making reconciliation with the show's continuity difficult.
Movie War Core
In Kamen Rider OOO: Nobunaga's Desire, Doctor Maki oversees the resurrection of Nobunaga in an operation comissioned by Kousei Kougami. He is unnerved when Kiyo-chan is dropped on the floor in the struggle to restrain the reincarnated Nobunaga.
When the Greeed lend their Core Medals to OOO, Kiyo-chan us seen holding one of Maki's purple Cores attached to Kiyo-chan which joins with the remaining two in Eiji's body, allowing OOO to destroy Gara with the combined power of all of his Combos.
Hikonin Sentai Akibaranger