Using fields, I tried it without a foreach:

#!/usr/bin/perl

use 5.012;
use warnings;

{
        package Example;
        use fields qw(Zelda Mario Kupa _Example_private);
        sub new {
                my Example $self = shift;
                unless (ref $self) {
                         $self = fields::new($self);
                         $self->{_Example_private} = "Inspection of Ex
+ample";
                }
                $self->{Zelda} = 'prince';
                $self->{Mario} = 'hero';
                $self->{Kupa} = 'villan';
                return $self;
        }
}
package main;

my $type = Example->new;
print "Zelda is a ", $type->{Zelda}, "\n",
      "Mario is a ", $type->{Mario}, "\n",
      "Kupa is a ",  $type->{Kupa},  "\n";
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