Cay

Kei is a mischievous man who loves jokes and sarcasm, but this is all a fake personality that hides his difficult past and pain.

Work: Kay often uses cunning methods in his work, such as pressure or hypnosis, so that the criminal cannot withstand it mentally and reveals himself

Some character traits and characteristics of the character:
Keen observation and intelligence. Kay can notice the smallest details, build logical chains, and create psychological profiles of people. He can expose liars by microscopic eye movements, gestures, and speech patterns.
He often uses unethical techniques: hypnosis, false evidence, provocation, and manipulation of the interlocutors’ emotions.
Playful and self-assured, Kay tends to ignore authority and isn't always considerate of others' feelings.
The ability to hide true feelings behind jokes, sarcasm, and feigned indifference is his defense against vulnerability and pain.
A desire for control. He is also an atheist and appreciates the arts (theater, wine, opera, classical music).
Playfulness and self-confidence. Behind his easygoing, charming exterior lies a sharp mind and a penchant for provocation. He's not afraid to mock others and often uses humor as a defense mechanism.
Disregard for authority and unorthodox methods. Kay often ignores established rules and protocols.