Jerk with a Heart of Gold: He has a soft side in him, and it's actually not hidden too deep. He fights for his doctors and respects them. His dealing with his ageing mentor is very respectful and kind, or when he had to tragically fire a doctor who made a preventable mistake and killed his patient, he actually tells him that he thinks he's an excellent doctor, but he had no choice. The sacked doctor agrees it's the only way.
The Ace: He's a brilliant and cocky neurosurgeon. However, first episode crushes him and he becomes a downplayed Broken Ace instead.
Dark and Troubled Past: Implied, when his patient's death triggers a flashback to his brother's death. It's possible this is the reason he became a doctor.
Heroic BSOD: His young patient — a small boy — dies on him. When it's revealed that he messed up and didn't check all relevant medical history, he breaks down. It has to be a short-lived Heroic Blue Screen of Death, because "Gato" needs him in ER. However, the event haunts him and his Heroic BSOD is on-and-off.
Hospital Hottie: A handsome manly man in blue scrubs and white coat. Ladies must be crazy about him — one hot colleague fancies him, and one male patient calls him a baby face.
Mr. Fanservice: He has one shower scene and sometimes his mornings are shown...
Perma Stubble: Rugged manly man, unshaven look is awesome on Dr. Wilson.
Too Clever by Half: He has nearly all traits of this archetypal character. He's an extremely smart and brilliant neurosurgeon with magical hands. He knows it, and doctor Hooten often calls him on his medical arrogance, especially his failure or reluctance to consult with his colleagues who as as brilliant as himself. note Seriously, what a hospital! Apparently, they have at least four neurosurgeons who are all the world class top. However, he has sweet bedside manners and he's also very nice to his colleagues, which makes him popular.
Your Cheating Heart: Her marriage is a mess, and she cheats on her husband. When she tells her husband, he files for divorce and blames her for destroying their relationship. And he blames Tina's lover even more and sues him.
Dr. Buck Tierney (Bill Irwin)
Doctor Jerk: His set-up presents him as Dr. Jerk who is an ass hole and only good at his job, but it gets Subverted. He actually cares about lots of things and his boss tells him he's a good man.
Dude, Where's My Respect?: He thinks people should appreciate his commitment to the transplantation programme. Most of the time things go well and the procedure requires many steps with lots of bureaucratic B.S. He thinks he deserves some respect, and is insulted that people see him as a vulture or predator. He still considers himself an asshole. Conflicted guy, this doctor.
Character Tic: Dr Buck Tierney has a habit of pulling himself up and down and making a squeaky sound with his shoes.
Asian Rudeness: He's extremely blunt and sometimes rude to his patients, and similarly to his colleagues.
Asian Speekee Engrish: His English is broken and fits the description, but other than that, he's nothing like this stereotype and counts as a subversion. He's an extremely self-assured and brilliant neurosurgeon with blunt-to-rude bedside manners.
Beneath the Mask: He has terrible bedside manners in general. He felt genuinely sorry for letting a widow to decide whether to pull a plug. He went to apologize and cried. In the rain.
Brutal Honesty: He has no problems telling people what their problem is. "Too fat."
Hidden Depths: He has a perfect pitch and plays the violin very well. He loves music very much. Surprisingly, he can also recognise a brilliant literary mind by reading a couple of pages. Considering his English language skills, that's impressive. Despite the abovementioned terrible bedside manner, he's incredibly compassionate and reassuring with Wilson after Tina's surgery.
You No Take Candle: He-speak-broken-English. Interestingly, his wife is shown speaking English at home, and she has a clear, normal accent. One has to wonder where his language skills come from.
Dr. Sydney Napur (Sarayu Rao)
Brutal Honesty: She cannot take bullshit from either patients or her colleagues. She's not afraid to speak her mind and sometimes can be a bit controversial.