Name: Kim Taehyung (but everybody calls him J.Seph; also known as Ace)
Age: 27
Supernatural creature: guardian (telepathy & reading minds)
Group: K.A.R.D (symbol: in the middle of his back)

Name: Kim Matthew (better known as BM but also known as King)
Age: 26
Supernatural creature: guardian (able to erase memories)
Group: K.A.R.D (symbol: right chest)

Name: Lee Taeyong
Age: 24
Supernatural creature: guardian (able to see and feel souls)
Group: NCT (leader, symbol: right side of his neck)

Name: Moon Taeil
Age: 25
Supernatural creature: guardian (healing power)
Group: NCT (symbol: back of the right hand)

Name: Nakamoto Yuta
Age: 23
Supernatural creature: warlock
Group: NCT (symbol: right shoulder)

Name: Qian Kun
Age: 23
Supernatural creature: werwolf
Group: NCT (second in command, symbol: right shoulder blade)

Name: Kim Doyoung
Age: 23
Supernatural creature: banshee
Group: NCT (symbol: right collarbone)

Name: Chittaphon Leechaiyapornkul (known as Ten)
Age: 23
Supernatural creature: Demi-dragon
Group: NCT (symbol: right chest)

Name: Jung Jaehyun
Age: 19
Supernatural creature: Demi-dragon
Group: NCT (symbol: left chest)
Information: Student of the 8A class at Miroh High

Name: Won Kunhang (known as Hendery)
Age: 18
Supernatural creature: elf
Group: NCT (symbol: right arm)
Information: Student of the 8B class (same class as Minho, Changbin etc.) at Miroh High

Name: Lee Mark
Age: 18
Supernatural creature: siren
Group: NCT (symbol: right upper arm)
Information: Not a student at Miroh High

Name: Xiao Dejun (better known as Xiaojun)
Age: 18
Supernatural creature: vampire
Group: NCT (symbol: right shoulder)
Information: Student of the 8A class at Miroh High

Name: Zhong Chenle
Age: 16
Supernatural creature: banshee
Group: NCT (symbol: back of the right hand)
Information: Student of the 6B class at Miroh High (he is Samuel's classmate)

Name: Park Jisung
Age: 15
Supernatural creature: warlock
Group: NCT (symbol: right shoulder)
Information: Student of the 6B class at Miroh High (he is Samuel's classmate)

Name: Dong Si Cheng (also known as WinWin)
Age: 19
Supernatural creature: warlock
Group: NCT (symbol: left shoulder)
Information: student of the 8A class at Miroh High

Little Note: Guardians are chosen magical creatures, who get their powers from a special ritual, which is performed by an very old tribe of warlocks when they are considered to be ready to take their place as a protector of the supernatural world. Those powers can be everything (from telepathy to telekinesis to the ability to fly; just everything) and most of the time the power is linked to the guardian's destiny. In addition to that power they have strong magical abilities, which they get taught to control by the tribe of warlocks, who grants them their powers.