CEO of Reina Hotel A woman whose dating life is difficult because of ghosts! In her late 20s to 30s. She has lived an isolated life, deceiving both the world and herself by claiming she isn't afraid of ghosts, until a man appears by her side. A man's hand covers Yeo-ri's eyes, fearing she might be scared of the ghosts. She can feel that hand trembling with terror, yet it is incredibly warm. "Do I deserve to be loved? I... want to try loving someone." As the heiress to one of the nation's leading conglomerates and the CEO of Reina Hotel, she possesses natural talent, exquisite beauty, a stunning figure, and an innate aura of elegance and wealth. "Are you really confident enough to hold my hand?"

Prosecutor at the Seoul District Prosecutors' Office A man who fell in love with a woman who sees ghosts! In his 30s. An ace prosecutor at the Seoul District Prosecutors' Office, he possesses an outstanding physique, a brilliant brain, and a sexy gaze. He is an alpha male with a rich emotional sensitivity that naturally comforts the hearts of MBTI 'F' types, a righteous temperament, and warm humanity. In his work, he doesn't know how to play petty tricks; he is the embodiment of a rigid prosecutor who goes straight for the goal once he starts. He considers Im Seo-hyun just a colleague and has absolutely no feelings for her. He also dislikes the physical contact she initiates. "If it's your hand, I guess I'll try holding it one more time."

Late 20s. Cheon Yeo-ri's cousin. However, because her father is from a branch line, she shares no blood relation with Chairman Baek Kyung-ja (Chairman Baek), the head of the group, which puts her at a disadvantage for succession. Consequently, she harbors an extreme complex toward Yeo-ri, the top candidate for successor. Constantly eyeing Yeo-ri's position, she is a bundle of airheadedness, vanity, and snobbery, revealing an unbearably shallow personality within just five minutes of conversation. "I'll give you anything, so just do something about this."

Late 70s. Kang-wook's grandmother, whose only wish is for Kang-wook's health and longevity. One day, Kang-wook suddenly brings home a woman as his fiancée, only for her to be born in the Year of the Black Monkey—the very sign she warned him never to even step on the shadow of! To this, she desperately screams, "I am absolutely against the two of you!!!" "I am absolutely against the two of you!!!"

Chairman of Reina Hotel & Resort Late 70s. The chairman of the nation's leading Reina Hotel & Resort, she is a strong, iron-willed woman. Since Yeo-ri is her only blood relative within the group, she wishes to pass the group down to her.

Prosecutor at the Seoul District Prosecutors' Office 30s. Kang-wook's classmate from the Judicial Research and Training Institute and a fellow prosecutor at the Seoul District Prosecutors' Office. She is a colleague who harbors a one-sided love for Kang-wook. She often naturally links arms with Ma Kang-wook. Because of her familiar behavior, Cheon Yeo-ri becomes jealous of Im Seo-hyun. "Prosecutor Ma! Want to grab lunch together?"