Callum is the first Subway Surfers character that identifies with they/them pronouns, the second is Bob the Blob and the third is Charlie. In a SYBO TV video it stated that Callum is a boy, which Callum is in the Chinese Edition. It was later confirmed they were non-binary.

Charlie is the 3rd character released in 2024, after Tiger, and Hasina. surfer 1st being Diego and 3rd being Tutti. They are the third confirmed non-binary character after Callum and Bob The Blob. They are the 15th blond character.