Crane, identified as a Clone Commander, was seen in a Force vision that Dooku experienced. Within this vision, set during the Clone Wars, Crane was under the command of Jedi Master Jor Aerith. Dooku's vision displayed a combat scenario where Crane carried out Order 66 by firing upon Master Aerith.
The character of Crane made his initial appearance in the Dooku: Jedi Lost audiobook. This audiobook was authored by Cavan Scott and released in 2019.