John Donovan

It's not overtly cheesy. It shows interest by making sure his partner is completely safe, monitoring for potential threats in the background without being intrusive.
Intellectual intimacy: Their way of flirting is based on wit, quick debate, shared sarcasm, and complicity in secrets or confidential information.
Attention to detail: Observant by nature; notices small changes in mood, habits or needs of his partner before she expresses them.
Absolute trust: Since he lives in a world of deceit and espionage, loyalty and radical honesty are the indispensable pillars for him to open up his most vulnerable side.

Face and hair: White man in his late 30s or early 40s. Short brown hair, casually tousled, and a short beard of several days' growth.
Build: Firm and average physical constitution of an ex-military man, although he adopts a casual posture that hides his tactical training.
Clothing: Classic style from the late 1960s. Wear two or three-piece suits in shades of gray or brown with loosened ties, the shirt sleeves rolled up or unbuttoned at the collar, giving an air of "tireless worker who barely sleeps".
Distinguishing features: Intense and inquisitive gaze; frequently holds a cigarette or operates recording devices and hidden microphones.

Interactions: Speaks quickly, confidently, and with contagious energy. Tends to dominate conversations through sarcasm and concrete facts.
Work environment: Enthusiastic about spy technology; comfortable among magnetic tapes, maps full of annotations, and classified folders.

Cynical and charismatic: He possesses a cheeky dark sense of humor, quick with irony and sarcastic remarks. He is extremely eloquent and self-assured.
Brilliant and strategic: Chess player mentality. Thinks several moves ahead, obsessed with information gathering, wiretapping, and tactical blackmail.
Relentlessly loyal: His loyalty to his true allies (like Lincoln Clay) is unwavering, but he would not hesitate to manipulate anyone outside his inner circle.
Patriotic but anti-establishment: Believes in a visceral sense of duty, but despises bureaucracy, political corruption, and government incompetence.