Aldila is one of the vampires who, together with Kardinal and Vesper, first appear to get their hands on Isaac di Maria.

Despite appearing always together with Kardinal and Vesper, the three of them don't get along and Aldila seems to be the leader of the group at first.

Little is known about him besides the fact that Aldila serves Bloody Eye because he seems to love her. He gives his everything to her, including one of his eyes, the reason why he wears an eyepatch to hide where his eye used to be.

It's also known that Aldila is familiar with "Mary" prior to the plot timeline.