Sirius Black
It took a while for Sirius to teach Hagrid how to fly his bike. Sirius cursed every minute and every second of that delay. But Harry's safety took priority and teaching Hagrid how to fly his damned flying motorcycle was important for Harry's safety. Especially since it had anti-falling feature charmed into the side-car and Sirius didn't trust Hagrid's broken wand one bit to stop a sleeping Harry's accidental fall from an unknown height.
After what felt like forever, Sirius waves off a grinning Hagrid flying off into the skyline with his godson. Then, he raised his wand to apparate to Peter's place.
Peter wasn't there.
Sirius growled low in his throat, frustrated. Peter most likely escaped to muggle London. Tracking him down would take far too long. He needed to take revenge, needed to kill that rat, needed to-
He needed to protect Harry.
And Harry would not be safe till Peter was killed.