Crimefighting with Cash: Sort of: the Kisugi sisters are filthy rich, and use their money to finance their thefts, help people when they can (and at least once this made them even richer), and to expose a sale of fake painting by paying for a squadron of F-15 to move the real ones from New York to Japan and then exhibit them the next door from the fakes' sale.
Cut Lex Luthor a Check: The Kisugi sisters could be very successful professional athletes in multiple disciplines, art critics, actresses, police officers and, in Ai's case, as a scientist, yet they only use these abilities to steal.
Subverted with their skills as art critics: Ai used her knowledge of arts (that is noted to be superior to her sisters') to unmask a sale of fake paintings.
Dark and Troubled Past: The Kisugi's sister father disappeared in a fire when they were children, with all his paintings being stolen and themselves and their mother being hunted down by the killers until they managed to disappear.
Dressing as the Enemy: One of their favourite tricks is to disguise themselves as generic police officers, with Rui disguising herself as Toshio in a memorable occasion (leading to him being Mistaken for Gay due Rui's inability to act manly) and Hitomi taking Mitsuko's place in multiple occasions (including two in the same chapter).
Fountain of Expies: Pretty much every female Phantom Thief is at least somewhat based on the Kisugi sisters. The most prominent expies are Kasumi Aso from City Hunter (a professional thief who only steals on commission and for good reasons, who looks like Hitomi and ends up working at the Cat's Eye cafe for good measure) and Alex from Totally Spies! (based mostly on Ai's personality, with her same name in the French dub).
Fiction500: The properties of the Kisugi sisters include a gigantic golf club, and they can casually create a pharmaceutical company capable of buying out half the Japanese market.
Meaningful Name: Cat's Eye is the name of Michael Heintz's favourite cocktail, that he invented himself. Naming the gang and the bar Cat's Eye is part of their call for him.
Ms. Fanservice: Ai just a little less than her sisters, but they all qualify.
Parental Abandonment: The Kisugi sisters' father, Michael Heintz, was apparently killed in a fire when they were little (Ai was so young she didn't even know his face), and their mother died sometime later. The search for their father drives half of the plot.
Refuge in Audacity: They get away with most of what they do because the police won't expect them to be that crazy. Among what they do, they have a coffee house called Cat's Eye placed right behind a police station, and that includes half the personnel of the police station among their patrons.
Rich Idiot with No Day Job: Subverted: the sisters and Nagaishi are filthy rich, yet the sisters work at a bar and Nagaishi is a powerful businessman.
Secret Identity: The Kisugi sisters' identity as both Cat's Eye and the daughters of Michael Heintz are kept secret. On the other hand, at one point of the manga Hitomi's Cat's Eye persona admits being Heintz's daughter...
Serious Business: Art in general and paintings in particular. Faking paintings and selling them as the original is a good way to get on their shit list.
Identical Grandmother: Hitomi is a dead-ringer for her German paternal grandmother, except for the hair and eye colour (she has black hair and brown eyes, while the grandmother had blonde hair and green eyes). Halfway during the manga she invokes this by dying her hair, wearing green lenses and presenting herself to Toshio as a member of Cat's Eye and Michael Heintz's daughter while standing right next to a portrait of her grandmother.
Jerkass Fašade: At the start of the manga she claims she's still dating Toshio only to get informations for their heists, partly in an attempt to convince herself of this. She stops pretending after willingly botching an heist to save Toshio's career.
Rule of Cool: Even more than her sisters, Hitomi does extremely dangerous things during the heists to grab even more attention.
Fixing The Game: Don't bet against her at anything that involves her throwing or spinning something, she can calculate how much strength she needs to use to get her desired result. She has been shown doing this with French-style roulette, American-style roulette, and Russian Roulette (the guy who bet against her on the latter soiled himself when Rui grabbed the gun on his turn and showed he was about to kill himself).
Hello, Nurse!: In-universe she's considered the most beautiful woman around.
Hello, Nurse!: Rather beautiful, even if not as her sisters. Ironically, she's the one with the most in-universe fans, as Hitomi and Rui are so beautiful that they subdue their admirers with their presence alone.
Hidden Depths: She's a ditz and quite childish. She's also the finest art critic in the series, and can recognize a very good fake from the original with a single glance.
Identical Mother: She's growing up very similar to her mother and oldest sister, only without the mole.
She Cleans Up Nicely: A particularly extreme example, as the only thing she needs to graduate from 'cute girl' to 'drop-dead gorgeous woman' is to squint her eyes: by making her eyes appear smaller her face is much more mature, and her natural good looks do the rest.
Reassigned to Antarctica: The squad was initially formed because the members had embarrassed the police too many times during the hunt for Cat's Eye, with and later being assigned to them for unrelated screw ups.
Reassignment Backfire: As soon as the squad is formed, Cat's Eye proceeds to humiliate the first squad in a heist, and doesn't get away with the loot only because the Special Squad manages to steal it back from her.
Crouching Moron, Hidden Badass: He's not too intelligent. Can also run almost as fast as them, can overpower any one of the girls (not easy due their martial arts knowledge), he's a crack shot, and nearly trapped them more than once.
Dating Catwoman: Bonus point for his girlfriend being cat-themed. Hitomi's attempts to stop him from realizing her 'side job' provide part of the story's drama.
Face of a Thug: He looks more like a Yakuza than a cop. Endlessly Lampshaded, with Hitomi neutralizing him by crying he was a pervert and a murderer during a chase (him swinging his Hand Cannon didn't help his case).
Gun Nut: Rather obsessed with guns in in general and his Hand Cannon in particular. He's even called a gun nut to his face...
Hand Cannon: Doesn't carry the standard issue .38 Special revolver (either the Smith & Wesson Model 36, the S&W Model 37 or the New Nambu M60) but the Smith & Wesson Model 686 chambered in .357 Magnum (can still fire the .38 Special), and is rather good with it.
An old but experienced officer, assigned to the Anti-Cat's Eye Squad due his embarrassing habits.Tropes associated with Unno:
Bunny-Ears Lawyer: Even more than the rest of the squad: he's a pervert with the habit of travelling on trains without ticket (he'll steal someone else's) and casually pickpocketing people, and a scary competent cop who dealt with a dangerous criminal by stealing the magazine of his gun (with the train ticket, of course) and luring him where he knows there's half a dozen other cops.
Dangerously Genre Savvy: The only member of the Syndicate who was willing to consider the chance that Cat's Eye was composed of Heintz's daughters (i.e. his nieces), and manages to discover their identities.
Chekhov's Gunman: He first appears as the unnamed Jerkass owning a museum targeted by Cat's Eye. Various chapters later, Cat's Eye warns the police they'll steal a supposedly burned painting from him, thus introducing the whole Cranaff Syndicate.
Frame-Up: Tries to frame Cat's Eye for murder. The police sees through it as he described Cat's Eye as a group of tall men (Cat's Eye including at least one woman was not known outside of the police yet), but they let him do it to have the chance of getting evidence against him and try and arrest Cat's Eye too.
Hoist by His Own Petard: In his final appearance he confided in a group of armoured dog to kill at least the member of Cat's Eye whose smell they had sniffed (Ai). Ai successfully dodges the the armoured dogs in the garden and uses them to deal with his men inside the mansion.
Happens to the armoured dogs too: some of them are neutralized when they hit each other with the spikes on their armours.
Humiliation Conga: His last appearance has his mansion devastated by Ai fending off armoured dogs and axe-wielding cops trying to save her, one of the outer walls is destroyed by Ai to run away with a painting, then he's arrested for the murder he tried to pin on Cat's Eye, the attempted murder of Cat's Eye and perjury, and Toshio decides to humiliate him further by revealing the police saw through his frame up since the start and that Cat's Eye is composed by women.
Killed Off for Real: Subverted: he's the only member of the Cranaff Syndicate who is not confirmed as having been blown up by Cranaff or being otherwise dead.
Put on a Bus: After the failed frame up he's arrested for murder and attempted murder, and isn't seen again.
Screw the Rules, I Have Money!and Connections: In his first appearance he's caught in possession of various stolen paintings and arrested. In a later chapter we see Toshio complaining for his release and the disappearance of the evidence, obtained either due corruption or his political connections, or both. He later uses his money to get away with some other crimes, before being arrested again for murder and attempted murder.
Super-Persistent Predator: Invoked: after seizing a piece of Ai's clothes, he has a group of armoured dogs smell it so they'll chase Cat's Eye until they murder the member who lost the piece of cloth. Ultimately subverted, as Ai uses the armoured dogs to neutralize his guards before defeating them.
Wake-Up Call Boss: In his final appearance. Before then, any foe faced by the girls was easily fooled and defeated, Seguchi included. Then Hitomi nearly dies to steal a painting from him, the painting is revealed being a fake on live TV, he convincingly frames Cat's Eye for murder (the police sees through it only because they know Cat's Eye is a band of women while he described them as tall men), and Kamiya and Ai are nearly killed by his armoured dogs.
Also, his first confrontation with Cat's Eye involved the girls getting in a desperate fight with a Giant Mook tough enough to shrug off being hit on the head with a bottle.
Assorted villains with some impact on the story.
Ambassador of the Country S
A foreign ambassador implicated in arts smuggling.Tropes associated with the ambassador:
Graceful Loser: Immediately pays the stakes upon losing, and offers a trip back to shore. Her caretaker, on the other hand, needs to be threatened with a torpedo...
Noble Demon: The only reason she is a villain is because she is a criminal and owns casinos (illegal under Japanese law).
Properly Paranoid: Chooses her croupier at the last moment to insure fairness, and, upon realizing that her chosen croupier Rui is most probably an accomplice of Hitomi and capable of sending the ball wherever she wants, she has their game played the French way, with bets placed after the wheel is spun. Hitomi and Rui still manage to fix the game.
Worthy Opponent: Picks her opponents in bets among the best and luckiest players of her casinos. To challenge her, Hitomi had to cheat her way into simulating having almost impossible luck.
A mysterious criminal mastermind who is trying to move a treasure from Japan to the US.Tropes associated with Kaibara:
Ambiguously Gay: Looks and acts straight, yet he continuously says that Toshio is exactly his type. It's not clear if he's serious or just doing it to creep out Toshio.
Badass: He doesn't like fighting, but when he gets involved in hand-to-hand combat he's formidable.
Boring Yet Practical: When compared to Cat's Eye: they use larger-than-life stunts, while he uses disguises, clever tricks, sleights of hands and the occasional Roof Hopping and is just as effective if not more.
Overshadowed by Awesome: As a thief he's just as good as Cat's Eye (and possibly even better: he can sneak up on them, while they never managed to sneak up on him), but their methods just get them more fame.
Also Inverted, as he proved many times he's just as good if not better than the girls.
Daddy Had a Good Reason for Abandoning You: Near the end of the manga it's revealed he did decipher his daughters' call, but is staying on the run due the Cranaff Syndicate and him knowing the location of the the Athenai Aphrodite, a statue that hundreds of art collectors are willing to kill for, and how to recover it. The girls recover the statue and give it back to the Greek government specifically to eliminate this reason.
Brutal Honesty: And poor Hirano and Takeuchi are at the receiving end of it.
Not So Harmless: At first she's only annoying due her attempts at seducing Kono, and the only reason she gets involved in the story is that she photographed Hitomi as Cat's Eye by chance (the camera was set to photograph the moon, so she only got a silhouette). Then she sees one of the Cat's Eye in action, recognizes her as Hitomi, and starts helping Mitsuko...