The Mentor

Ladan Xanatos is a specter, and one of the most dangerous ones of the multiverse...

Mentor of Danny Runner, loves him like a father loves his son. He's an alternative universe counterpart of the Blood Monarch ( Vladislav Korolkrovi), Danny's nemesis, but he never went mad with power and is, under several aspects, his own different person.

Ladan is proud of his uniqueness in the multiverse, as much as he's proud of being himself, a self-made man who built his fortune, his name, and his power.

Looks

In both human and "spirit" form, Mentor displays the discolored patterns of piebaldism, as well as the typical white streak in his hair, starting from his forehead, slightly off-center to the left.
In ghost form, Mentor has a pair of medium-large, lightning-shaped horns that appear to be covered in thick, sharp plates.
An interesting thing to note is that his entire body (except for his face, hands, and feet) is covered in tattoos of magical sigils and spells, effectively turning him into a living grimoire, even more powerful than a common magical book, since ink on skin makes spells more powerful (and is one of the reasons why parchment grimoires are so sought after). Mentor does not like to be seen without clothes, not only because it would reveal one of his secret weapons to others, but also because the tattoos were not an aesthetic choice, but rather one of necessity.