The Poe Clan by Moto Hagio.

Short Vampire stories or as Hagio calls them "Vampirnella". The main character is Edgar, a 14 year old who is transformed into a vampire by the leader of a Vampirnella clan. Because of this, he became immortal but will never grow up. Edgar is an interesting character. Sometimes lonely, sad and frail but others cruel and sadistic. He loves his sister Marybelle and his friend Alan and would do anything or everything for them. Themes to think about are immortality, loneliness, life and death. The stories start from Edgar and Marybelle's transformation, in the 18th century, to stories in the 19th and 20th centuries. I think my favourite is one in which a group of people gather in the early 20th century to compare stories about a strange boy called Edgar who is mentioned in various writings and paintings dated since the 1700s. They want to know if this Edgar (and Marybelle) is the same person.