During its massively successful and ongoing run since 2005, THE iDOLM@STER franchise has generated a roster of 300+ characters that regularly expands. Due to this continuous growth, the original Character Sheet has been divided into sections dedicated to each flagship entry of the franchise:
- THE iDOLM@STER: Characters originating from the foundation and 2nd Vision titles. This includes but not limited to: iDOLM@STER, iDOLM@STER 2, Dearly Stars, and anime and manga based directly off these properties. They are collectively considered the core cast of iM@S.
- THE iDOLM@STER: Cinderella Girls: Characters originating from the Cinderella Girls franchise. Originally a mobile device card game, it contains the largest iM@S cast: over 190 exclusive characters and growing.
- THE iDOLM@STER: Million Live!: Characters originating from the Million Live! franchise, including the original mobile game and Theater Days. It features a total of 39 exclusive idols.
- Puchim@s! Petit iDOLM@STER: Characters originating from the Puchim@s! franchise. A comedic manga later adapted into an anime miniseries with Drama CD support, it contains Super-Deformed personalities of the core iM@S cast.
- THE iDOLM@STER SideM: Characters originating from the SideM franchise. An unexpected Spear Counterpart series and mobile device game. It features 45 new male idols, as well as the Jupiter trio from the foundation games and Ryo Akizuki from Dearly Stars.
- The iDOLM@STER.KR: Characters originating from the Live-Action Japanese-Korean TV drama.
- THE iDOLM@STER: Shiny Colors: Characters originating from the Shiny Colors franchise. Launched as a HTML5-based browser game, it currently features 25 exclusive idols.