As written before, they should change him from being a vampire spawn to being a slave of a vampire. He can keep his personality, he still has reasons to kill or escape his former master and we remove all the problems with the vampire powers he does not have.
A vampire spawn is quite powerful, they regenerate every turn unless hit by radient damage, can climb on walls and ceilings and they are resistant to necrotic damage. Being damaged by running water can be avoided most of the time. Only sunlight sensitivity is bad in a timeless game where it never gets dark except while resting.
Prof. Dr. Dr. Mad S. Tist
World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already