ドラルク
The world's most fragile vampire. He dies to the common vampire weaknesses, such as:
* stakes
* crosses
* sunlight
* garlic
* silver

but [i]also[/i] 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.
draluc (kyuuketsuki sugu shinu)