The mission was supposed to take about a year, in Earth-Dimension time.
To cover up, Harold decided to work at a bookstore in Diagon Alley.
One day, Harold had a very nice conversation with a young lady.
"Going to Hogwarts?" He asked, inspecting the huge pile of books the girl bought.
"Yep!" She said. "I come from a non-wizarding family, so I have no idea what to expect."
Harold smiled. "I'm a..." He grimaced," pureblood, supposedly, but I was abused by non-magicals when I was young and adopted by a foreign non-magical who was aware of magic. I've lived with him ever since."
She looked sad. "You were abused?"
He nodded. "Yes, I was. I was supposed to go to a magical family, but a certain manipulative old man made me go to the non-magicals." He looked very angry.
The young witch looked confused. "Who was the manipulator?"
Harold sighed. "You may not believe me but... Albus Dumbledore."
Her eyes widened. "What?! But he's a very powerful... light wizard..." Her eyes narrowed.
Harold smiled. "See? Media is not something you should trust."
She now looked hesitant. "I don't want to go now."
Harold handed her the bag of books and patted her shoulder. "You want to learn magic, right?"
She nodded.
"Then go. See for yourself wether he's trustworthy or not."
She brightened. "Okay!"
"Whats your name, sir? I'm Hermione Granger."
"I'm Harold Sjoberg." He leaned in and winked, whispering, "I used to be called Harry Potter."
Her eyes widened to the size of dinner plates before she smiled and walked out of the store.