The world's most fragile vampire. He dies to the common vampire weaknesses, such as:
stakes
crosses
sunlight
garlic
silver
but also dies to:
being hit by an opening door
the traps in his own castle
biting his own tongue
being insulted
falling down the stairs
being sneezed on
having his video game save files deleted
seeing a large bug
having his rent raised
and so on. Luckily for him, when a vampire dies they turn to dust, but regenerate after a while if left alone. Unluckily for him, he's the deuteragonist of a manga that derives about half of its comedic potential from him dying painfully.