The main cast remains consistent, featuring established leads and notable guest appearances for flashback sequences: as Jang Uk Jung So-min as Mu-deok Hwang Min-hyun as Seo Yul Shin Seung-ho as Crown Prince Go Won Jo Jae-yoon as Jin Mu

: In a poignant scene, Maidservant Kim prepares a memorial service for Naksu's father. Mu-deok (Naksu) uses this rare moment to mourn her family, while Seo Yul watches from afar, burdened by guilt over their shared past.

: Under the guidance of Master Lee, Jang Uk undergoes a unique training regimen disguised as a fishing trip to catch "Golden Fish". This process is revealed as a method to help him master Chisu , the high-level ability to control atmospheric energy.