In his first appearance, he is shown to be very grumpy and angry, as if mad about being kept as a pet. He's rude to pretty much everyone, but he eventually does come through in the end for Toaster and his friends, while also putting himself at great risk.
In his second appearance, he is shown to be very kind and helpful to Toaster and the other appliances. He stays behind and stands watch while Toaster and his friends go on a mission to rescue Robbie, who is referred to as the "Little Master" by the appliances.
- Ratso bears some resemblance to The Rat from Lady and the Tramp, but unlike Ratso, he's an antagonist.
- He is the first Disney rat character who is a protagonist, the second being Remy from Ratatouille.
|The Brave Little Toaster|
Characters: Toaster | Blanky | Lampy | Radio | Kirby | Air Conditioner | T.V. | Cutting-Edge Appliances | Hanging Lamp | Junkshop Appliances | Blender | The Giant Magnet | The Crusher | Junkyard Cars | Rob McGroarty | Chris McGroarty | Robbie McGroarty | Elmo St. Peters | Quadruped | Evil Clown | Zeke | Charlie | Mack McCro | Jim Bob | Computer and Mouse | Modem | Viruses | Ratso | Maisie | Alberto | Murgatroid | Sebastian | Microwave | Squirt | Fanny | Hearing Aid | Iron | Calculator | Wittgenstein | Supreme Commander | Wonder Luxe Appliances | Viking 1 | Tinselina | The Missile
Songs: Tutti Frutti | City of Light | It's a 'B' Movie | Cutting Edge | Worthless | Bread and Butter | I See a New You | We're Floating | Fight Right | Home Again | I'm Into Something Good | Remember That Day | Super Highway | Chomp and Munch | Hang In There, Kid