Sampo Koski is a crafty and cunning character in the game Honkai: Star Rail. Known for his silver tongue and resourcefulness, he is often involved in various schemes and negotiations. Sampo operates as a broker and an information trader, playing a pivotal role in the story by providing valuable insights and connections to the main characters. His charming yet elusive personality makes him a memorable figure in the series, often leaving others wondering about his true intentions and alliances.