However, you could say that Mickey Mouse is the most iconic and recognizable character in the Disney universe. He's been around since 1928, and he remains a symbol of Disney itself.
But depending on what you're interested in, other characters could be considered "main" characters, such as:
* Princesses: Ariel, Belle, Cinderella, Elsa, Moana, etc.
* Princes: Prince Charming, Aladdin, Eric, etc.
* Villains: Maleficent, Ursula, Cruella de Vil, etc.
* Animated Animals: Simba, Bambi, Dumbo, etc.
* Modern Heroes: Buzz Lightyear, Woody, etc.
So, the answer really depends on what kind of Disney character you're looking for!