How do I select in specific columns and continue to get a list of the entity and not an array of Object?

An entity list will not be possible in this model, but what you can do is create a class with the attributes you need and make a builder available with those attributes. See:

public class UsuarioAtributos {
  private String nome;
  private String sobreNome;
  private String email;

public UsuarioAtributos(String nome, String sobreNome, String email) {
    // definir os mapeamentos
}

And in your query you would define it this way:

SELECT new meu.pacote.UsuarioAtributos(u.nome, u.sobreNome, u.email) FROM Usuario u

The return will be a list of UserAttributes and not an Object array anymore.

Completing the response of the escapiston, it is possible to do, and it is practically what he already said in his answer:

Assuming your User class is in the following package: br.com.myour system.entities.

Here you can make jpql like this:

SELECT new br.com.meusistema.entidades.Usuario(u.nome, u.sobrenome, u.email) from Usuario u

Notice the new and path of the class.

And it would be necessary to add a matching constructor in the User class:

public class Usuario { 
        private Integer id; 
        private Email email;
        private String nome;
        private String sobrenome;
        private String senha;
        private String usuario;
        private List<Grupo> grupos;

        //construtor padrão
        public Usuario(){}

        //construtor corresponde a busca
        public Usuario(String nome, String sobrenome, String email){        
            this.nome = nome;
            this.sobrenome = sobrenome;
            this.email = email;
        }

        //getters e setters

    }

In short: you need a constructor with the attributes you are looking for in select, and add new and class path in JPQL , so you could get a List as a query return, because for each row of the table will be instantiated an object using the constructor that corresponds to the attributes of the query, if you do not have a corresponding constructor, an exception will be bound by saying that there is no appropriate constructor.