All Girls Want Bad Boys: Duchess points out several times to her children that they are better than alley cats, but seems to have no problem with romancing Thomas. Then again, he was being very charismatic.
Batman Gambit: His stunt with the milk truck shortly after meeting Duchess and her kittens for the first time. As Duchess points out, he could have been killed.
Cats Are Snarkers: Especially toward the Gobble sisters. Since they were being complete jerks to him, the audience can sympathize.
Distressed Dude: He jumps into a river to save Marie, which quickly backfires because he really can't swim.
Expy / Pigeon Holed Voice Actor: In the original version, he was voiced by Phil Harris, who also did Baloo in The Jungle Book. Granted, Thomas is more of a sophisticated, suave and adult version of Baloo than an expy, but still.
Heroic Build: Subverted: The Gobble sisters say he has one, but once they find out he's not actually married to Duchess they point out every last one of his physical flaws.
Anti-Villain: Edgar is one of the few Disney Villains who is not exactly pure evil; while he is greedy, he does not seem to be cruel. It would have been easy for him to just kill Duchess and her kittens, but instead, he chose to kidnap them and release them into the wildó-and when that didn't work, he decides to send them to Timbuktu. Moreover, he's shown to have more redeeming features and is never willing to kill anyone.
Woobie, Destroyer of Worlds: He does seem like a fairly decent guy near the beginning, despite his bumbling nature. Is it really so hard to feel bad for him when he learns that he'll likely never see a penny of his mistress's fortune because the cats inherit it first? Granted, he becomes a lot less decent as the film goes on, but still.
A group of alley cat musicians who play jazz with Scat Cat. They help rescue Duchess, O'Malley and the kittens at the climax of the film.
Adaptation Name Change: If you accept the names given at Wikipedia and The Disney Wiki (which are used here) as official, all the alley cats have different names in the Spin-Off comic O'Malley and the Alley Cats (Hit Cat becomes Cyril, Shun Gon becomes Chino, Billy Boss becomes Boris and Peppo becomes Luigi).
Cats Are Mean: Along with their leader, the alley cats taunt Roquefort while preparing to eat him—until he tells them that O'Malley, Duchess and the kittens are in danger. They immediately rush to the rescue, allowing Roquefort to lead them.
True Companions: To each other, to Scat Cat, to O'Malley, and eventually to Duchess and the kittens. O'Malley lampshades this: "They're kinda rough around the edges, but if you're ever in a jam, wham! They're right there."
Toulouse, Marie and Berlioz
Voiced by: Gary Dubin (Toulouse), Liz English (Marie) and Dean Clark (Berlioz)