heteronym
imaginary character created by a writer to write in different styles
Chevalier de Pas
heteronym used by Fernando Pessoa
Vernon Sullivan
pseudoynm of Boris Vian
Isidore Nabi
fictional character, supposed author of a number of humourous academic articles
Ricardo Reis
heteronym used by Fernando Pessoa
Alexander Search
heteronym used by Fernando Pessoa
Bernardo Soares
heteronym used by Fernando Pessoa