The next day.

When Harry and Ron came to visit Hermione at the school clinic, they found that instead of the sullenness of the previous days, they found her with a furry face, waving her wand excitedly, and occasionally looking over the parchment on the table.

"Hermione, what are you doing?"

"Practicing spell, of course. If nothing else, I might be able to learn them in time before school starts."

"Why before school starts?" Ron wondered.

"Because it'll help me out a bit," Hermione said with narrowed eyes and a grin.

So, during the half-hour Harry and Ron stayed in the ward, they watched Hermione repeat the same action hundreds of times, stopping occasionally to make notes on a sheet.

...

Felix closed the office door and walked out fully dressed.

Along the way, he sighed a little.

After he revealed that he had successfully obtained the research materials and once again resisted the fascination of the diary, Tom the diary had finally shut himself off, and he completely blocked his communication to the outside world.

No matter how Felix tried, the opposite side seemed to have made up his mind to be at his disposal. Even when he placed a cluster of morbidly white stern fire in front of the diary, he got no feedback.

"Tom, I don't believe you're going to give up on yourself." Felix's mind whirled with thoughts, and he even thought he was waiting for an opportunity.

So he sealed the diary more cautiously and even carved another warning magic text on the box.

Before going out, he set up his purse (the Bound Vine version) at the door in case some unreliable little wizard broke in and took the diary with him.

"Perhaps it's time to find a chance to finish your final curtain call, Tom."

In the corridor of the castle, Felix encounters the Pippi Ghost, who is playing a prank.

Pippi Ghost holding a tin bucket in his arms, filled with mud, and at the moment he is applying layer after layer of thick mud and water on the armour.

"Pippi Ghost, have you seen Ms. Gray?" Felix asked him.

Peeper looked at him and seemed taken aback, then let out a "giggle", "Oh, Professor, I didn't see ... I don't care about that snooty woman."

"I think there's someone who would know, that disgusting stalker~" he said, floating in mid-air with his mouth open.

"Be polite, Pippi." Felix said calmly, "Or, would you like to try my spell again."

"No, Felix Hap! You can't ..." Pippi Ghost had a scared look on his face as he hurried away through the wall.

"Clang!"

The tin bucket in Pippi Ghost's hand smashed on the ground with a loud clang, and the mud inside splashed in all directions.

Felix waved his wand, and an invisible barrier kept the soup and water three feet away.

"Humph, Pippi Ghost, you again! I will definitely file an application to Headmaster Dumbledore to kick you out of the castle ..." a panting, red-faced man rushed from the corridor, waving his fist and venting his anger, hysterically.

It is Hogwarts Castle Keeper, Filch.

"Oh, ah ... Professor Hap, have you seen Pippi's ghost?" The furious Filch did not see the expected arch-enemy, but instead saw the well-dressed Felix.

"Hello, Filch, the Pippi Ghost just left." Felix waved his wand, and the mud on the ground and on the armour disappeared. "By the way, did you see Lady Grey today?"

"Is that the Ravenclaw ghost?" Filch huffed, "Let's see, I think I saw ... a tall ghost, the one that hardly paid any attention to people? I saw that one in the courtyard, not sure if it is her."

"Thank you, Filch."

Felix came into the courtyard, scanned the area, and right at the end of the courtyard railing, saw a slender ghost floating in mid-air.

She noticed Felix watching her and raised her eyebrows in surprise before turning and floating away through the wall.

"Wait, Ms. Gray!"

Felix crossed the railing and chased her through to a secluded corridor.

She finally stopped, hovering a few inches above the ground. She looked beautiful, with waist-length hair and a silver robe that trailed to the floor. But at the same time, she held her head high, looking arrogant and uncaring.

He had bumped into this ghost a few times when he was at school, but not once had he spoken to her. If he hadn't stumbled upon a private conversation between Bloody Baron and her, he wouldn't even have realized that this Ravenclaw ghost, who had such a low presence, had such a big background.

" Ms. Gray, I'm Felix Hap."

She nodded, not speaking. There is no hint of enthusiasm in her eyes.

"I'd like to know about the founding days of the school, the story of the four founders, there are too many ambiguities in the existing records."

"I'm sorry," she said, turning to leave, "I can't help you."

"Wait, ma'am-" Felix called out as he watched her drift further and further away, "I know you're Rowena Ravenclaw's daughter."

She stopped and turned to look at him. "You are aware of my origins? You came here specifically for me?"

"Yes, I-"

"Heh, another one!" She hovered in mid-air, her lips twisting into a sneer.

"Another what?" Felix trailed off, but he quickly realized that he shouldn't be the first person to ask her about the hidden secrets of Hogwarts.

"Another ambitious one!" She said rather sharply, "Every ten years or so I come across one, asking and tricking me in every possible way ..."

"You mean Voldemort?" Felix asked.

She suddenly stopped talking and had a surprised expression on her face. Then she felt offended and floated upward two or three feet to look at him condescendingly.

"Yeah, I guessed it, the Ravenclaw crown. Voldemort has always coveted the relics of the Four, but I don't care about that, I'm more interested in knowing-"

Felix's words were interrupted as the ghost stated with anger and stuttering, "The crown of Ravenclaw brings wisdom, and you do not understand its power! Countless people dream of it!"

"-Gryffindor and Slytherin's past." Felix also finished the sentence just now at the same time.

The two people's words intertwined, and a faint echo came from the empty corridor - "Do not understand its power!" "Gryffindor" "Slytherin's past~"

Ms. Grey froze, "You want to know about that?"

"Of course."

"Ah, well," she floated in mid-air, seeming a bit overwhelmed, "Gryffindor ... Slytherin ... you want to know Something about them!?"

She asked at last, somewhat stiffly.