The Trailblazer is the playable main protagonist of Honkai: Star Rail. They are awakened during the opening events of the game by Kafka and Silver Wolf, who leave them to be found by March 7th and Dan Heng on Herta Space Station during the Antimatter Legion's invasion. The player gets to choose either Stelle (female) or Caelus (male), along with their Receptacle Codename.

It is recommended to reference Caleb Yen's original English Dub: https://youtu.be/DRNXWd9SSVI?si=8La3KDKDR7ppBwUb&t=83