Vilan tossed and turned in bed, and just as he was about to fall asleep with his eyes closed, he suddenly thought of something else.
On the Hogwarts Express, Hermione had told him what 'authority' was.
That kind of thing also seemed to be gradually acquired through learning knowledge...
He thought about it until he fell asleep.
The most interesting class on Thursday was Defense Against the Dark Arts Class.
Their Professor was Lupin.
Ever since Lord Voldemort died, the shelf life of the Defense Against the Dark Arts Class Professor at Hogwarts was no longer just one year.
Before long, Dumbledore simply hired the impoverished Lupin for the position.
Thus, this gray-haired, haggard, but gentle middle-aged man was the Defense Against the Dark Arts Class Professor at Hogwarts on Vilan's first day of school, and he continued in that role until Vilan's fourth year.
According to reliable news from Harry, Lupin and Tonks had been married for several years.
Their son, Teddy, would be coming to Hogwarts in three years.
Lupin was very solid on all kinds of Dark Arts defense knowledge.
Vilan really liked his classes and was glad that his Defense Against the Dark Arts Class Professor didn't cause different problems every year.
Vilan had sold some more of the stationery he stocked, and he estimated that with one more day of work on Saturday, he could sell all of it.
By then, he would have another 1 to 2 Galleons in gross profit.
Thinking of this, Vilan was ecstatic and hummed softly as he walked towards the Great Hall.
With the recruitment of new House-elfs in recent days, the food provided in the Great Hall gradually became more abundant and delicious.
As Vilan was chewing on a greasy chicken leg, someone patted him on the back.
Vilan turned around and saw two Ravenclaw girls.
He didn't recognize the girl with golden-red hair on the left, but the beautiful black-haired girl on the right seemed to be... Cho Chang?
"Hello, I'm Cho, and this is my friend Marietta Edgecombe."
Cho smiled gently and extended her hand to Vilan in a friendly manner:
"You left a very deep impression on me on the first day of school."
"My name is Weilan Costa."
Vilan shook the hand with long, slender fingers and smooth skin: "Do you have a commission for me?"
The two girls looked slightly stunned.
It was Marietta who broke the silence first: "Cho wants to ask if you have any free time this Friday."
"No time."
Vilan's schedule for Friday was to go to Hogsmeade, Upper Hogsmeade Village, and Lower Hogsmeade Village, the three most expensive villages, to bargain.
"What about Saturday?"
"No time."
Vilan's plan for Saturday was to sell off the stationery he had stocked last semester as quickly as possible.
"Sunday?"
"No time."
Vilan had to finish his homework and review his lessons in advance.
At the same time, Dumbledore had arranged to test his talent on Sunday evening.
"Next week?"
"No time either."
Starting next week, commissions for the detective agency would come flooding in, and Vilan would be extremely busy.
"You... what are you busy with every day!"
Marietta was a little exasperated.
Vilan's curious gaze scanned them both up and down:
"I have a lot of things to do every day.
I need to earn money, otherwise I won't have food to eat after leaving Hogwarts."
"Are you giving me a long-term commission?"
Cho covered her mouth with her hand, slightly surprised:
"I'm sorry, I didn't mean to cause you trouble."
She lowered her head shyly: "I just wanted to find some free time to invite you to Hogsmeade to play."
Thinking of the prices in the joke shops in Hogsmeade, Vilan subtly shifted his gaze:
"There are many interesting things in Hogwarts; I don't like going to Hogsmeade to play."
Except for occasionally returning to the Three Broomsticks to order a butterbeer, Vilan almost never patronized other shops in Hogsmeade.
"Is that so?"
Cho was a little disappointed, "It's okay, I'll bring you something fun next time."
"Huh?"
Vilan hadn't expected Cho to respond this way after such a clear refusal.
He looked at the girl opposite him in surprise, but she just smiled gently at Vilan, then took her best friend's arm and left.
Although this was just a small interlude, Vilan had now, in a way, gotten to know this girl of East Asian descent, Cho Chang.
That evening, Hermione not only finished writing the ten G.G.s they needed to post on the bulletin board but also brought a box containing about fifty badges.
The badges were of various colors, but each had the four letters "S.P.E.W." on it.
Hermione sincerely invited Vilan and Ron to join her "Society for the Promotion of Elfish Welfare" (abbreviated as SPEW).
Ron's expression was truly priceless as he turned the badge, printed with "S.P.E.W. (Spew)," over and over in his hand several times.
Vilan looked at these spew badges, his mouth twitching:
"First, Hermione, I support your efforts to protect House-elf rights."
"Secondly, I think this name is really bad.
No one would want to wear a badge that says 'Spew'.
This name of yours is not conducive to attracting new members."
"So, I suggest changing the name to Welfare Promotion Society for Elves (W.P.S.E.), which would avoid awkward situations in many cases."
Vilan was sincerely offering Hermione advice.
Hermione scratched her head and took Vilan's advice to heart:
"You have a point."
"But these badges... well, I'll go to the library these next few days to research if I can change the font on them using Transfiguration."
"But I think you two can join me now."
Vilan was naturally very willing.
Under Hermione and Vilan's enthusiastic gaze, Ron also "agreed."
Hermione read them the organization's manifesto, determined its goals, and set the membership fee at 2 sickles per member.
Seeing that Vilan had obediently paid the money, Ron couldn't say anything and could only nod repeatedly with a bitter expression.
But Hermione took all the badges from the box; she wanted to research how to change the font on them in the coming days.
Vilan and Ron also returned to their dormitory to sleep after that.
The next day, Vilan got out of bed as soon as it was barely light.
He ran through the three villages and spent 1 sickle at a vendor in Upper Hogsmeade Village to buy a large bag of Floo powder.
By using a pinch of Floo powder to return to the Gryffindor common room, Vilan even managed to make it just in time for lunch.
"I haggled the price down to half.
That money should definitely be enough, Ron.
The rest is for your errand fee."
Vilan explained this to Ron in the Great Hall, while cutting a large piece of blueberry pie into his mouth.
The blueberry pie crust was crispy on the outside and tender on the inside, having absorbed all the blueberry juice, presenting a sweet yet refreshing taste that wasn't cloying.
The blueberry jam inside, after long baking, had become warm and soft, and upon entering the mouth, it immediately turned into a thick fruit juice.
Ron sat next to Vilan, his cheeks bulging, eating with great relish, a circle of yellow pumpkin juice sticking around his mouth:
"Okay, Vilan, I'll take care of it from now on!"
"By the way, the new House-elfs Professor Flitwick recruited are truly excellent cooks."
Vilan hesitated for a moment.
Ron's words reminded him again of the House-elfs who would fill his suitcase with food before every summer holiday.
"You know, Ron, I actually truly, truly agree with Hermione."
Vilan told Ron his true feelings: "I believe House-elfs really need more rights.
Their current effort and income are completely disproportionate."
As soon as Ron heard the words "House-elf" and "rights," he sighed and shook his head:
"Alright."
Seeing that Ron wasn't interested in the topic, Vilan could only continue to tinker with his lunch.
Ron's task was scheduled to start on Saturday, and due to the large area, his task would last two days.
Hermione had already written the G.G.s they needed to post, neatly, ten copies in total:
"Costa Detective Agency, the trusted choice for Wizards in Hogwarts and the surrounding areas!
We are proficient in various magic spells and magical creature behaviors.
Whether it's encrypted letters left by invisible ink or strange lost items after Apparition, we can accurately restore the truth using professional magic investigation methods, safeguarding your magic rights!
Costa Detective Agency, your reliable detective agency forever!
If you need help, please send an owl to Mr. Weilan Costa at Hogwarts, and include your residential address with the letter.
We will arrive by your side the next day to solve any problems you may encounter."
At the very end, Hermione attached Vilan's glorious resume of solving the Hogwarts poisoning case, as well as the detective agency's pricing rules.
Aside from Hermione praising him to the point of embarrassment in the final resume, Vilan was generally very satisfied.
He used Hogwarts as a dividing point on the map, dividing the surrounding areas of Hogwarts into two parts, north and south, and helped Ron plan the optimal route in advance.
After doing these things, Ron set off with the money, Floo powder, and the G.G.s.
On Saturday, Vilan finally sold all the stationery he had stocked last semester.
Just as the detective agency's promotional work was completed, commissions would become more and more frequent, and Vilan thus bid farewell to the small vendor business.
On Sunday, Ron had disappeared early.
When Vilan was eating breakfast in the Great Hall, an owl once again delivered a letter from James.
"Something big has happened."
James wrote bluntly at the beginning of the letter.