Shy Gree is a childhood friend of Boo Rock and a supporting character in Evil Rising. A few days after the hospital is incinerated, Shy Gree asks Boo Rock why he didn't turn transparent to avoid injury, which Boo Rock replies that its because he is a rock. Shy Gree is soon paralyzed in fear when Gigadark Bowser Jr. joins their class. When Boo Rock collapses, Shy Gree shrieks and she accuses Gigadark Bowser Jr. of trying to instill fear into others by force.
Shy Gree is a green Shy Guy.
- Despite being a Shy Guy, Shy Gree is female.
- Shy Gree is considered as the movie counterpart to Sakura Haruno.