It could be Hagrid. He loves all kinds of magical creatures and would be very interested in seeing what Harry has in his pet shop. He might even give Harry some advice on taking care of the more dangerous ones.
Perhaps Neville Longbottom. He has a soft spot for plants and animals. He might come to the pet shop looking for a pet to keep him company. He could be interested in a toad, like the one he had before, or maybe he would be adventurous and choose a different kind of magical creature.
Hermione Granger could be the first customer. She is always eager to learn new things. She might come to the pet shop to research on magical creatures for her studies. She could also give Harry some tips on how to run the business in an organized and efficient way, like setting up a proper inventory system for the pets and their supplies.
Well, he might sell magical creatures like owls, toads, and perhaps even some rare and exotic ones like hippogriffs. He could use his knowledge of magic to take care of the pets and also teach the customers how to handle them properly.
Well, he might create some unique potions. Maybe a potion that can make people temporarily have the ability to speak Parseltongue. It would attract a lot of curious wizards and witches to his shop.
Well, he might open a magic shop. He could sell all kinds of magical items like self - writing quills, enchanted maps, and potions. Maybe his friends would help him run it. For example, Hermione could manage the accounts and Ron could test the products.
Other potion shop owners might visit too. Not as customers in the traditional sense, but more to check out the competition. They might be curious about Harry's unique potions. And then there are the local wizards and witches in the area where the shop is located. They could need potions for daily life, like a potion to make their gardens grow better or a potion to keep their pets healthy.
One possible plot could be that a new, mysterious pet appears in the pet shop in Diagon Alley. This pet has some unique magical abilities that no one has ever seen before. A young witch or wizard discovers it and tries to figure out its origin and how to take care of it. Maybe it's a key to an ancient magic mystery.
One main character could be a young, aspiring wizard who has always dreamed of having a magical pet. He visits the pet shop regularly to look at all the amazing creatures. Another could be the eccentric old owner of the pet shop who has a wealth of knowledge about magical pets.
Harry Potter himself could be a main character. He might be on a mission to find a pet for a friend or to solve a mystery related to the pet shop. Hermione would also be a great choice as she's always interested in learning about new magical creatures. And Hagrid, of course, with his love for all beasts, could play a major role.
Hermione would be a great partner. Her intelligence and knowledge of magic would be invaluable. For example, if Harry opened a potion - making business, Hermione could handle the research and development of new potions, while Harry dealt with the business side like marketing and customer relations.
Well, you could have a plot where a rare and dangerous pet escapes from the Pet Shop of Horrors and the main characters from Harry Potter have to track it down before it causes chaos in the wizarding world. Maybe there's a pet that can change its form and is being used by a dark wizard to spy on Hogwarts students. Or it could be that a special pet is the key to unlocking a hidden magic in the Forbidden Forest and different characters are vying to get it from the pet shop.
The profits of a pet shop were affected by many factors. From the perspective of the sales of pet food and supplies, the profit margin was generally around 30% - 50%. If 10 - 20 pieces of pet food or supplies could be sold every day, the daily profit would be around 250 - 1000 yuan, and the monthly profit would be around 7500 - 30000 yuan. In terms of pet grooming services, bathing and simple grooming for a small dog might cost 80 - 150 yuan, the cost was about 20 - 30 yuan, and the profit was 60 - 120 yuan. If you could provide grooming services for 5 - 10 pets every day, the daily profit would be about 300 - 1200 yuan, and the monthly profit would be about 9000 - 36000 yuan. If it involved the sale of live pets, pet care (including medical and health care), and pet boarding, it could also bring profits. From the examples, there was a pet shop in Beijing with an investment of 800,000 yuan and a monthly profit of 200,000 yuan, and a pet shop in Hangzhou with an investment of 3 million yuan and a monthly profit of 200,000 yuan. Therefore, there was someone who opened a pet shop, and under different scales and operating conditions, the annual profit varied greatly, from tens of thousands to hundreds of thousands or even more.