Police/Detective/Profiler/Investigator :)

Pretty much every character is police lol. V good drama would recommend.

Koo Kyung Yi is an insurance investigator who investigates a murder so it counts. Love her <3

Lee Je Hoon <3 plays criminal profiler Park Hae Yeong. I'd watch anything he's in tbh.

A team of underdogs tryna get criminal profiling to be a thing. Everyone apart from the main leads are massive dickheads lol.

Han Joo Won is a police officer investigating a very suspicious man in a rather homoerotic way.

Follows a prosecutor, Hwang Shi Mok, and lieutenant, Han Yeo Jin. Good lads the both of em. 

^

Kang Ha Na is a prosecutor investigates the main group, she's not the main focus but pretty prominent.

About a  zombie detective, Kim Moo Young, hence the title. Tbh I barely remember anything abt this series other than the fact I wasn't a fan of the romance lol.

Park Jin Gyeom is a detective but the focus of the show is more abt the time travel antics. Too much implied incest fr.

This fruity as hell. Follows an investigator, Kinoshita Ichiro, and gang leader, Hanabusa Shiro.

Kang Ki Beom is technically a police officer but kinda not really. 

Heavy romance between a police officer, Meng Shao Fei, and gang leader, Tang Yi. They have my heart.

Park Jung Woo is a prosecutor but is in jail for most of the show lol.

Jung Ba Reum, a rookie officer, chases a serial killer. I'm bad at predicting twists for most dramas, this one included lol.

Park Gwang Ho is a detective that goes to the future. Kinda like Life on Mars but less fun.

Kang Gil Young is the detective of the group, and also my least favourite of the trio but she grew on me.

Shin Joon Ho is a detective looking for his missing fiancé, but their storyline is not the most interesting or major.

Shin Joon Ho Back again looking for missing people, king. The whole drama is basically solving cases even though they’re not all police.

 Kuno Totono is just a man who wants to eat curry but keeps getting dragged into crime solving. Love him <3

Oh Goo Tak, a detective, forms a team of criminals to fight crime. He is very annoying and has bad hair.

Honma Kai and Ichinose Jiro are kick ass police academy cadets who go above and beyond their lines of duty.

Suzuki Chika Is a detective tryna figure shit out.

Chen Chu Ying is a police officer who uses others to advance her career lol.

Jin Ho Gae and his partner Pil Gong Myung (best boy) are a pair of detectives who are very co dependant with some fire fighters.

This is hardly about first responders anymore (╥﹏╥)

Ryu Soo Yeol is the captain of the Anti Corruption Unit. K is an honorary member ;--; 

Officer Shim Bo Kyung is either a genius investigator or a brilliant conspiracy theorist that got lucky.

Lee Hong Sae is the classic sceptic (and lieutenant) that I very much relate to in paranormal investigations.

Sherlock/Shishio & Watson/Wakamiya... self explanatory.