Conversation so far:
who dies in book 5 of harry potter
Sirius Black dies in Harry Potter and the Order of the Phoenix.
how does sirius black die
Sirius Black was killed in a battle at the Ministry of Magic by his cousin, a Death Eater, Bellatrix Lestrange in Harry's 5th year at Hogwarts.
did Sirius Black have any nicknames
Sirius Black was also known as Padfoot or Snuffles
which house did sirius black belong to
He, along with his three friends, belonged to Gryffindor house when at Hogwarts, unlike the rest of his family, who had belonged to the house of Slytherin.

Question: how was the character related to harry
Self-contained rewrite: how was sirius black related to harry potter