Sirius immediately felt at ease the second he entered Honeydukes, breathing in the familiar sticky sweet air. The shop was packed with students, as always. After a couple of minutes of wandering around the shelves he remembered why he had come to Hogsmeade in the first place and panicked slightly. Why in Merlin's name did this girl have to be this tiny and unrecognizable? She was the size of a fourth year, he hardly could see her in the crowd. With him being a generous 6'1 tall, he towered over majority of the students, with the exceptions of some seventh years and his best friend James.
Finally he spotted her tousled short mane in the crowd and squeezed through the customers, not caring whether he was brushing past them, since nobody could avoid body contact when going into Honeydukes anyways.

Phia stood in front of the chocolates, the books wrapped in brown paper piled on the ground, trying to reach for the Chocoballs in the very top layer of the shelf. He almost wanted to laugh out loud, but it came out as a silent cackle, startling a first year next to him.
'Little shrimp can't get her chocolates, huh?', he thought, watching her with amusement.
She puffed her cheeks in the most adorable manner and Sirius itched to reach for his wand to conjure the jar of chocolates down for her, but to his amazement the jar was already moving. She hadn't twitched a finger and held no wand in her hand. She took the jar when it was in front of her chest, and filled a huge amount the candy in one of the pink paper bags. Then she sent it back upwards, still not using a wand or incarnation whatsoever. Sirius jaw literally almost hit the floor. Wandless magic. Without incarnations. And she did it as though it was the most natural thing in the world. He shook his head slightly. This should be no news for him. It fit exactly into the description Peter and Remus had given him. Why did this take him off guard?

She took out a simple bag made of mint colored cloth from her cloak, and suddenly her books shot upwards, one after another and disappeared inside the bag.
Sirius' eyes started bulging out of the sockets.
'Moving items and an undetectable extension charm?'
She really was something. She slung her bag over her right arm and went to the next shelves, repeating the same procedure as with the Chocoballs with various toffees and bonbons and Chocolate Skeletons. At last she got herself a good couple of packages of Fizzing Whizzbees. Sirius kept wandering behind her, sneaking himself his own sweets here and there, reminding himself to leave the money behind the counter. He was no thief, after all.

Phia paid and then stored the sweets inside her bag.
'For a girl she seems to stomach quite a lot of food.', Sirius thought to himself, remembering how most girls would skip desserts and only buy diet candy in Honeydukes.
On closer observation he noticed that her figure was nowhere near as scrawny as he had made her out to be. She had a good amount of package in the right places, but hid it quite effectively under her sloppy clothing.
'She must've inherited these clothes from a male relative of some sort. No girl voluntarily dresses in boy's sweaters and jerseys unless she has no other options.', he ranted on in his mind, certain of his infallible knowledge of the female mind.
Sirius sneaked behind the counter and dropped a handful of coins where only the shop owners could see it. He then followed his quest of the day outside, stuffing himself with the goodies he had just obtained. He found her in the middle of the market place, which bustled with busy people, looking around with a thoughtful expression, scratching her hair in the process. Just now he noticed how much younger and cute she actually looked. Her cheeks no longer looked dull, but pleasantly pink from the cool spring air and her overall complexion seemed clearer and fresher. Contemplating, he had to admit that though she didn't fit the general definition of beauty, she actually was quite a looker, but in a weird way. She had an androgynous touch, due to the short hair and boyish choice of wardrobe, yet, when he thought about it, her voice had a pleasant feminine ring to it.

Sirius shook his head underneath the invisibility cloak. What was he even thinking?
Phia was the most incurable geek of the school. Unless she was reading or concentrating on class she bore holes into the walls with her exorbitant staring and day-dreaming.
Why was he following her around, trying to figure out her personality? He should be with his best friends, playing pranks on his fellow students, emptying the shelves of Zonko's and wolf-whistling whenever a girl with long hair and a pretty face passed.
He couldn't find the answer, because out of a sudden, the very person around whom his thoughts had been revolving had disappeared into thin air and he couldn't spot her anywhere.
He took a turn around the village, hoping to spot her somewhere admidst the students, but couldn't find her. Dejected, he returned to the castle, frustrated with his own stupidity for losing her and yet he couldn't process why he even felt this aggravated. She was just another girl among many. She had never taken notice of him until she had bumped into him and made a bitchy statement about his dating policy. It was none of her business and it shouldn't be bugging him, after all this wasn't the first time he had people calling him out for his actions.

He shuffled his feet when he returned to the Common Room, taking off the invisibility cloak and when his friends welcomed him, Sirius lost no word about the things he had done or seen throughout the day and forced himself to act as though nothing out of the usual had happened.
As a matter of fact, it had been an ordinary visit to Hogsmeade for all the students, with no fights and no drama. But it hadn't been so for a certain Black, who had let his curiousness get the best of him and had tried to sneak into someone's life without their permission and without them even knowing. He felt a little guilty and made a promise with himself to never pry into someone else's privacy again, no matter how tempting it may appear at first.