Shun is an aware, cautious and an intelligent person. His personallity type is an INTJ, He is mostly introverted and humble. Shun is a diamonds player in the borderlands which meant he excels more in a game of wits. Shun's only goal is to survive and keep his two friends which is Mina and Kenji alive. But he couldn't fulfill that promise as Mina died in one of the games while sacrifing her life for Shun, and Kenji died because someone murdered him.