Unable to speak English, Yo-Yo experienced difficulties interacting with S.H.I.E.L.D. but soon formed a close bond with Mack (Henry Simmons.)
Yo-Yo’s continued involvement in the series was previously indicated by promotional artwork for season 5 that features the main cast and Yo-Yo.
At the beginning of the season, Yo-Yo was revealed to be secretly working with Daisy, who at the time was a fugitive from S.H.I.E.L.D. Yo-Yo was also a central character in the “Agents of Hydra” storyline.
The character was also the star of the digital miniseries Agents of S.H.I.E.L.D.: Slingshot.