Disclaimer: I do not own Harry Potter.
[This did not go the way I planned. Very pun-intentional. I'll probably do a SB round #2 later. Also, crack. And did I mention the puns?]
Sirius Black
Doggedly looked out for his godson.
#Bonus 1
Barked up the wrong cousin sister.
#Bonus 2
"Life is ruff" – Sirius Black, probably.
(And... cringe. Hope you got the Bellatrix reference. Don't forget to leave a request/review.)