His Darkness

This is the first phase of Rylan's "demon" side and the most common you would see him in if he where to shift into it.

Since he already have trouble maintaining control in the first phase he rarely goes beyond this point, since he would completely lose control and succumb to his other half if he did that.

Whilst in this form even if he does have control over himself, his personality gets a slight change such as being less merciful and more malicious, but he is still reliable to his closest friends and family.
If he where to lose control he would become a threat to everyone, and there's no telling what he might do then.