Blue Veins (TV series)

• Law Lan as Lam Wong Chi-hung (藍黃紫紅) (literally blue, yellow, purple, red), a retired doctor, Mung-Nam's friend and later adopted grandmother.
• Wong You-nam as Ho Nin (何年) (literally what year), a comic writer and also Kin's student; he is later Ying's student, and subsequently Mui's boyfriend.
• Anjaylia Chan (陳嘉寶) as Ho Yuet (何月) (literally what month), Ho Nin's younger sister. She is a university student and an archer. She is Kin's student, and later Ying's student. She is the only student who is better than her brother and C Kwan in martial arts, although she only learns martial arts as a hobby. C Kwan is later her love interest. Later in episode 29, she turns into a zombie after being bitten by Ling Fung and she tries to kill Ying. She passes away in episode 32 and leaves all her last words with Lam Mung-Nam's "1-minute back alive" ability.
• Lai Wai-ling as Ghost Yau Ling-mui (丘玲梅) (homophone of ghost whisperer, 幽靈媒), a fortune teller in university and Ho Yuet's best friend. She is obsessed with the supernatural. She is later Nin's wife and they have a son called Ho Yat (何日) (same as what day).
• Luk Wing (陸永) as "C Kwan (C君)" Kan Ting-si (簡霆斯) (homophone of choose first, 揀定先), an assistant forensic pathologist. He is also Kin's student, and later Ying's student. He has so much difficulty in choosing things that he often can't make decisions on his own. He later has a crush on Ho Yuet.
• Moon Lau (劉佩玥) as Rosa, Pong Ying-tin's Assistant, Employee of Kam-Tin Medical Factory. Supervisor of Yo-Yo. Killed Yat-ming to avenged Pong Ying-tin and finally committed suicide finally committed suicide in Pong Ying-tin ’s grave. episode 31. Has feelings for Pong Ying-tin since he save her from child smugglers when she was a kid.
• Chun Wong (秦煌) as Kam Kin (金堅) (literally as hard as gold)
  • Jazz Lam as young Kam Kin, Ying Wot-zeok best friend. Nin, Yuet and C Kwan's master. He passes away in episode 9 while betting with Ying Wut-zeok to accept Ho Nin, Ho Yuet and C Kwan.
• William Fung as Tsui Lung-chu, Ying Wut-zeok's drinking companion and friend. Died in episode 32.
• Tai Yiu Ming as Gǔ-lù(古祿), CID Inspector. Colleague and friend of Mung and C Kwan.

• Joel Chan as Ling Fung (凌風); Sheldon, one of two the first-generation vampires from the year 2115. Age : 535 years old

He is given the instruction by Dr. Tayor to assist Amelia ( Lam Mung-Nam ) in retrieving a large amount of BR48 component from the past for the developing the vampire contagious virus cure (antiviral medicine) . He is bitten by Amelia whilst travelling in the time space wormhole through a space ship and becomes a super vampire. After that the space ship encounter a space-time storm causing it to wreck in the past leading him and Amelia to both land in the wrong time period with amnesia. He regain his lost memories after drinking Lam Mung-Nam's blood and decide to abandon his mission to go back to the future with BR48 substance. He enjoy being a vampire and tries to stop Lam Mung-Nam from back to future with the BR48 substance and he was Killed by Ying Wut-zeok during final battle in episode 33. Arch-nemesis of Ying Wut-zeok and Lam Mung-Nam.

• Hubert Wu as Pong Kit (龐杰), son of Pong Ying-tin, has the vampire ability to stop time for a short period. who he was indirectly transform to a vampire by his father in order to save his life from terminal illness during the Ming dynasty. He is a fan of Ho Nin's Martial art Novels and they become friends. He dies to find peace in episode 29. Age : 529 yrs old
• Jeannie Chan as Yuen Bing (阮冰), a human who turned into a vampire in order to take revenge on a man that hates girls. Killed by Ling Fung in episode 32. Age : 70-year-old
• Vincent Wai Lam as Ngok Yat-ming, a blind vampire. He was an ordinary blind human who turned into vampire in order to take revenge on Ying Wut-zeok 200 years ago. He accepts a challenge from Pong Ying-tin and kills him in episode 31 after Ying Wut-zeok loses in power. Killed by Pong Ying-tin's assistant in episode 32. Age : 250 years old

• Eddie Kwan as Pong Ying-tin (龐應天), father of Pong Kit. Former leader of the Kam-Yi-Wai. Chairman of the Kam-Tin Medical Factory corporation. For the last five hundred years he secretly has been try to develop a cure for Vampirism behind his comrades' back. He want to develop a cure in order for his son Pong Kit ( who he indirectly transform to a vampire in order to save his life from terminal illness during the Ming dynasty) to be human again. He is killed by the blinded vampire (Yat-ming) who he tries to slay to protect his friend, Ying Wut-zeok for redemption of bad deeds he has done that harm his comrades because of protecting vampire son in episode 31.

• Chloe Nguyen as Lee Sze Ya / Xenia, A mysterious blond hair woman that resides in Netherlands. Ten years before, She given Lam Mung-Nam a temporary cure for to suppressed her vampire powers.
• Lo Mang as Chan Tai-ping, Kam Kin's martial art rival, revealed to become a vampire by Ying Wut-zeok and killed by a vampire in episode 9
• Ho Ying Sin as participant of the Ground Boxing Competition.
• James Ng as Ah Fu, Late My Night customer
• Stephanie Ho as Ding Heung (丁香), a qing dynasty, Chinese vampire. Sister of Ding Lik (Guest Appearance in episode 27)
• Alan Wan as Ding Lik (丁力), a qing dynasty, Chinese vampire. Brother of Ding Heung (Guest Appearance in episode 26 and 27)
• Kei Po Lo as Dr.Tayor, Scentist from the year 2115. Supervisor of Amelia and Sheldon who send them on a time travel mission back to five hundred years to gather a main component for the vampire contagious virus cure (antiviral medicine) known as BR48 which is currently extinct in the year 2115.(Guest Appearance in episode 33)