Rookie is a policeman because he was kind and friendship to Hana.
He was born in Seoul
Rookie is now a loyal Korean police officer and the leader of the Emergency Center.
- His real name is Kyung Jae-song
- His birthday is on August 14, 1989
- Soon Min Yin (mother) (deceased)
- Kim Sul-jong (father) (deceased)
- Tsu Jing Yin (brother)
- Aiko Lin Yin (sister)
- Joon Su (nephew)
- Cherry (Chae Yong-bae) (daughter)
- Hana (Myung Soon-jin) (wife)
- Rookie he's a Korean.
- He studied at Yonsei University.
- In "The Treasure Is Mine!" Rookie when he was a younger age. In English he has a male voice, but in Korean he had a female voice.
- He fuse Hana into Mimi.
- Also available in Tayo the Little Bus: Take-n-Play.
- He is also a singer.
- In the future appearance, he has a black eyeglasses also called him "Sci-Rook"