Variable has value but form display empty, why?

I'm editing a object using this code:

public function editAction($id = null)
{
    $em = $this->getDoctrine()->getManager();
    $order = $em->getRepository('FrontendBundle:Orders')->find($id);
    $type = $order->getPerson()->getPersonType() === 1 ? "natural" : "legal";

    ladybug_dump_die($order);

    $orderForm = $this->createForm(new OrdersType(array($type)), $order, array(
        'action' => $this->generateUrl('update-order', array('id' => $id)),
        'method' => 'POST',
        ));

    return  array(
        'entity' => $order,
        "form" => $orderForm->createView(),
        'id' => $id
    );
}

All there works fine except that I'm not know/find how to display object Person values. If you take a look at the picture I've attached here you'll notice that Person comes with values:

In the other side I did the same but at Twig template and I make a debug to the form var and I get this:

Now at this point I'm confused and come with two possible ideas, that I hope, someone help me to develop or at least understand.

1. Find a solution and display the right form using all the info from the entity I'm passing to the view. This is the ideal and I'll like to work on this in order to learn, so help?
2. Get the Person object in controller and create a second form by passing Person object values, this should work but them I'll need a lot of changes in update function since forms will travel separately.

What I need here is to get the NaturalPersonType or LegalPersonType embedded in OrdersType any time I edit a existent Orders because right now I don't know how to display the widget in the twig template. Notice at the end the form I'm talking about in this case is a NaturalPersonType rendered but without values:

Adding OrdersType FormType

class OrdersType extends AbstractType {

    /**
     * @var string
     */
    protected $register_type;

    public function __construct($register_type)
    {
        $this->register_type = $register_type;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
                ->add('nickname', 'text', array(
                    'required' => FALSE,
                    'label' => "Nickname/Seudónimo",
                    'trim' => TRUE,
                    'attr' => array(
                        'class' => 'nickname'
                    )
                ))
                ->add('email', 'email', array(
                    'required' => TRUE,
                    'label' => "Correo Electrónico",
                    'trim' => TRUE
                ))
                ->add('phone', 'tel', array(
                    'required' => TRUE,
                    'label' => 'Números de teléfono (separados por "/")',
                    'trim' => TRUE,
                    'default_region' => 'VE',
                    'format' => PhoneNumberFormat::NATIONAL
                ))
                ->add('fiscal_address', 'textarea', array(
                    'required' => TRUE,
                    'label' => 'Dirección'
                ))
                ->add('shipping_address', 'textarea', array(
                    'required' => TRUE,
                    'label' => 'Dirección de Envío'
                ))
                ->add('shipping_from', 'choice', array(
                    'label' => 'Compañía de Encomiendas',
                    'choices' => SFType::getChoices(),
                    'empty_value' => '-- SELECCIONAR --'
                ))
                ->add('payment_type', 'entity', array(
                    'class' => 'CommonBundle:PaymentType',
                    'property' => 'name',
                    'required' => TRUE,
                    'label' => 'Forma de Pago',
                    'empty_value' => '-- SELECCIONAR --'
                ))
                ->add('order_amount', 'number', array(
                    'label' => 'Monto',
                    'required' => TRUE,
                    'precision' => 2
                ))
                ->add('bank', 'entity', array(
                    'class' => 'CommonBundle:Bank',
                    'property' => 'name',
                    'required' => TRUE,
                    'label' => 'Banco',
                    'empty_value' => '-- SELECCIONAR --'
                ))
                ->add('transaction', 'text', array(
                    'required' => TRUE,
                    'label' => 'No. Transacción'
                ))
                ->add('comments', 'textarea', array(
                    'required' => FALSE,
                    'label' => 'Comentarios'
                ))
                ->add('secure', 'checkbox', array(
                    'label' => FALSE,
                    'required' => FALSE,
                    'value' => 1,
                    'mapped' => FALSE
                ))
                ->add('lives_in_ccs', 'checkbox', array(
                    'label' => false,
                    'required' => false,
                    'mapped' => FALSE,
                    'value' => 1,
                ))
                ->add('suscribe_mail_list', 'checkbox', array(
                    'label' => FALSE,
                    'required' => FALSE,
                    'value' => 1,
                    'mapped' => FALSE
        ));

        if ($this->register_type[0] == "natural")
        {
            $builder->add('nat', new NaturalPersonType(), array('mapped' => FALSE));
        }
        elseif ($this->register_type[0] == "legal")
        {
            $builder->add('leg', new LegalPersonType(), array('mapped' => FALSE));
        }
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Tanane\FrontendBundle\Entity\Orders',
            'render_fieldset' => FALSE,
            'show_legend' => FALSE,
            'intention' => 'orders_form'
        ));
    }

    public function getName()
    {
        return 'orders';
    }

}

Adding NaturalPersonType

<?php

namespace Tanane\FrontendBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Tanane\FrontendBundle\DBAL\Types\CIType;

class NaturalPersonType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        parent::buildForm($builder, $options);

        $builder
                ->add('identification_type', 'choice', array(
                    'label' => 'Número de Cédula',
                    'choices' => CIType::getChoices()
                ))
                ->add('ci', 'number', array(
                    'required' => true,
                    'label' => false,
                    'attr' => array(
                        'maxlength' => 8,
                    ))
                )
                ->add('person', new PersonType(), array('mapped' => FALSE));
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Tanane\FrontendBundle\Entity\NaturalPerson'
        ));
    }

    public function getName()
    {
        return 'natural_person';
    }

}