user_view.rb

class User < PersistentDataStore::Base
  attr_accessor :first_name, :last_name
end

class UserView < SimpleDelegator
  def fullname
    "#{first_name} #{last_name}"
  end
end

user = User.new
user.first_name = "Luke"
user.last_name = "Skywalker"

user_view = UserView.new(user)
user_view.full_name  #=> "Luke Skywalker"
user_view.first_name #=> "Luke"
user_view.last_name  #=> "Skywalker"