" What's a Dullahan?'
'He's a headless horseman, in the service of the banshee.'
'Headless?'
'Yes.'
'Seriously?'
'Yes.'
'So he has no head?'
'That's usually what headless means.'
'No head at all?'
'You're really getting hung up on this headless thing, aren't you?'
'It's just kind of silly, even for us.'
'Yet you spend your days with a living skeleton.'
'But at least he has a head.'
'True.'
'He even has a spare. "

― Derek Landy , Mortal Coil (Skulduggery Pleasant, #5)