Demon Lord:

Name (Past Life): Lee Jaehyun (이재현, Jaehyun)

Reborn As: Minho (민호)

Notes: Best friend of Kim Taehyun in the past life.

Hero:

Name (Past Life): Kim Taehyun (김태현, Taehyun)

Reborn As: ??? (Not decided yet)

Notes: Best friend of Lee Jaehyun in the past life.

Father:

Name: Lee Sang-jin (이상진, Sang-jin)

Occupation: Famous and handsome actor

Relation: Father of twins.

Mother:

Name: Park Ji-yoon (박지윤, Ji-yoon)

Occupation: Famous and beautiful actress

Relation: Mother of twins.

King:

Name: Lee Rin (이린, Lee Rin)

Title: King of the Kingdom

Notes: Same age as the Hero (Taehyun) and Demon Lord (Jaehyun); friends with both in past life.