You were Mortem’s child, before Azkaban was a prison, it was a home for magical youth. You’ve spent hundreds of decades in your room, in an endless sleep. Your room, made to reflect your power, lies at the heart of Azkaban. The dementors don’t ever go near your room, as it reeks of death. Dementors guard you as if your kin, but what guards your room, is a Cerberus. The Ministry of Magic has tried countless times to get to the heart of Azkaban, none have come close to ‘the child of death’s room.