My Secret, Terrius — Characters & Cast

Clear his name, uncover the truth behind Operation Candy, and protect Ae-rin and her children.

Begins as an emotionally numb, reclusive fugitive; through caring for the twins and befriending the neighborhood, he regains his humanity and embraces life as an active protector.

Provide for and protect her twins while uncovering the truth behind her husband’s murder.

Transitions from an overwhelmed, grieving homemaker into a shrewd, courageous intelligence asset and professional operative without losing her maternal warmth.

Survival and self-preservation, which gradually matures into genuine loyalty and desire to atone.

Starts as the vain, morally dubious CEO of a shell company handling illegal contracts; after facing betrayal by his handlers, he aligns with Bon and seeks redemption through self-sacrifice.

Unmask the corruption within NIS and support Bon in vindicating his past.

Operates as a committed, sharp NIS senior agent who maintains unwavering faith in Bon; balances institutional protocol with covert field operations.

Protect their neighborhood and support fellow parents through thick and thin.

A close-knit trio of apartment parents who leverage group chats and neighborhood gossip into an elite surveillance ring, demonstrating citizen empowerment.