The main character, Cinnamoroll, is a white puppy with chubby and pink cheeks, long ears, blue eyes, and a tail that resembles a cinnamon roll.

A year later he was renamed "Cinnamoroll", to remedy problems with the registration of the mark overseas, however, he is now referred to in both ways, and also simply as "Cinnamon".

From 2007 original name "Baby Cinnamon" has no longer been used by Sanrio and, and he is officially called "Cinnamoroll".

[3][4] From September 13 of the same year, the English version began to be distributed on Sanrio's official US YouTube channel, Hello Kitty and Friends.

A short anime series titled I. Cinnamoroll Began streaming on the Cinnamoroll YouTube channel in October 2023, and a cooking television series featuring actor Ken Yasuda, titled Cinnamon to Yasuda Ken no Yurudoki Sūbun Cooking, it premiered on TBS Television October 7, 2023.

Around 2024-2025, I. Cinnamoroll was moved to the Hello Kitty and Friends YouTube channel and new episodes release every Friday at 1PM pacific standard time.

He also appears in the 2020 web series, Hello Kitty and Friends: Supercute Adventures hosted on Sanrio's official American YouTube channel where he started out as a minor character in Season 1, before joining the main cast in Season 2 alongside Hello Kitty, Pom Pom Purin, My Melody, Keroppi, Badtz-Maru, Kuromi, and Chococat.

Cinnamoroll also shows up in "Hello Kitty World" for Android and iPhone as one of the characters you unlock once you add a new attraction when you reach a certain level.

Cinnamoroll is also one of the racers in "Hello Kitty Kruisers" which is available for the Android, iPhone, Wii U, and Nintendo Switch.

Cinnamoroll also had a brief collaboration with Sky: Children of the Light, made by thatgamecompany, where he opened his café for players.

In 2005, a spin-off manga series that focused on The Cinnamoangels was made from 2005 - 2008 called "Puri Kawa Shinamonenjerusu!!"

[6] A novel adaptation titled Cinnamoroll: Cinnamon's Wonderland Trip (シナモロール シナモンのふしぎ旅行, Shinamorōru Shinamon no Fushigi ryokō) was released by Kadokawa Shoten under the Tsubasa Bunko label on September 15, 2014, which stars Cinnamoroll and Poron going through various adventures along with doing time traveling.

[9] Characters of the series also appeared in various Sanrio Puroland and HarmonyLand lives shows, parades, and events.

Cinnamon was featured in a music video with the Japanese rock girl band Scandal.

[10] In June 2012, Sanrio teamed up with MasatakaP to create an animated video coinciding the character's 10th Anniversary using the MikuMikuDance software.

A group of Twitter users started responding to the account's tweets with offensive comments regarding the character in March 2015, and the disruption worsened in May.