

By Dramabeans
Useless Lies
Nam Sung-woo
Seo Jeong-eun
16
60 minutes
tvN
South Korea
Korean
Source: Wikipedia

Jung Yeon-mi: Do-ha's mother who is a member of the National Assembly.
Mok Sol-hee: a person who gave up her everyday happiness when she was young due to her ability to recognize lies when she hears them in person. She is the owner of Tarot Cafe that also serves as a front for her interrogating business in detecting lies from people requested by clients
CEO's son
Jang Jung-gyu: the owner and drummer of Oasis Live Jazz Bar.
Choi Ji-hye
Lee Young-jae: a part-timer at a branch in Seoul.
Sya On/Sa Ji On: a top solo singer and the nation's younger sister.
Cassandra / Yoon Ye-seul: a superstitious tarot magician and barista.
Lee Kang-min: a detective who was once engaged to Mok Sol-hee, who 3 years later after their breakup, transfers police stations in hopes of reconnecting.
Mok Tae-seop: Sol-hee's father.
Cha Hyang-suk: Sol-hee's mother.
Jo Deuk-chan: CEO of J Entertainment who knows Do-ha's identity.
Kim Do-ha / Kim Seung-ju: a famous composer and producer in Korea who goes by the stage name "Kim Do-ha". He changed his name and went into hiding due to an incident in his past.