Psychometric or psychometry is an ability to read the memory of a person or the memory of a touched/used objects by touching them. 

[Hongjoong]
- Leads the Medical Examination on Rare Disease Cases team in Seoul
- Yunho's cousin and took Yunho in after his parents' death
- A serious doctor but is actually a big softy on the inside
- Always reprimand Yunho about his ability
- Put Yunho as medical advisor under his team
- Has a crush on Park Seonghwa 

[Seonghwa]
- Leads the Police/Detective Investigation on Rare Cases team in Seoul
- Childhood friend with Hongjoong and Yunho
- Knows about Yunho's ability
- A calm and collective detective
- Always bails Yunho out
- Secretly loves Kim Hongjoong

[Yunho]
- Is a psychometric
- Playful and always caught up in a trouble, accidental or not
- Is actually a genius and knows about medical terms
- Is a medical advisor under Hongjoong's team
- Hates touching people/things and vice versa
- Lowkey is actually touched-starved but afraid to read something that he shouldn't
- Wears big clothes that will protect his skin from being touch
- A sad puppy on the inside but never let anyone sees it

[Yeosang]
- A doctor under Hongjoong's team
- A post mortem doctor
- Always let Yunho in and told him to touch the bodies
- Knows about Yunho's ability
- A sweet and kind person but is a savage one
- Has a crush on Choi Jongho

[San]
- A prosecutor that always help Seonghwa's team
- Ready to fight the higher ups until every cases from Seonghwa's are finished
- Accidentally found out about Yunho's ability
- Always drag his co-worker, Jung Wooyoung to help him with Seonghwa's cases
- Is actually dating the said co-worker

[Mingi]
- A new transferred police/detective in Seonghwa's team
- Very serious and hates to play around while on job
- Very strong and very fast
- Excel in science thus excel in finding evidence 
- Doesn't believe psychic abilities
-The only person that Yunho can't read
- Annoyed with Yunho most of the time when they are working

[Wooyoung]
- A prosecutor
- Always got dragged by his co-worker to help with Seonghwa's cases
- Is secretly loves helping Seonghwa
- Knows about Yunho's ability via San
- Is dating Choi San

[Jongho]
- The youngest in Seonghwa's team
- The strongest of them all
- Always bribe Yunho to let him see Yeosang in the lab
- Knows about Yunho's ability but never mention to anyone that he knows
- Has a crush on Kang Yeosang