As a sentient being, mostly no. (Someone method-acting/role-playing Mickey Mouse kind of counts as a version of Mickey Mouse as a sentient being, in a very narrow sense.)
As a recognizable image, mostly yes. (The three-overlapping-circle motif will inspire a consistent experience of recognition in anyone who's been exposed to enough Disney products, but that's really a large class of images with very fuzzy boundaries.)
As a unitary individual, physically instantiated in the material body of an anthropomorphic mouse? Absolutely not.
As a copyrighted name governed by a certain body of laws and defended by a team of lawyers? Absolutely yes.
Platonism is stupid.