Davis learned a few Battle Techniques before, that uses his Soul Cultivation. They were known as Dark Concealing Shroud Art, Soul Suppression Art, Sacred Mark Art, and Unholy Brand Art.

Dark Concealing Shroud Art is a Low Level Sky Grade Battle Technique. It is used to conceal a person's presence, energy and soul aura using soul energy. It's power exhaustion is minimum, especially in the night. Davis would have been only able to use this Battle Technique if he had cultivated in a dark attributed Soul Cultivation method, and fortunately, he had his Death Note which emits dark and evil energy.

Soul Suppression Art, is a Peak Level Earth Grade Technique. It suppresses the target's soul. If the target is weaker than the user, then the target will not be able to move at all. If the target is stronger than the user, then it will provide a suppression effect depending on the target's cultivation level.

When Davis found these two Battle Techniques, the Sacred Mark Art and the Unholy Brand Art, he was shocked. This was a technique that can be used to brand a person's soul, making that person into a Soul Slave.

Even though the name Sacred Mark Art sounds righteous, it was no different than Unholy Brand Art. These two Battle Techniques needs a person to cultivate either light attributed or dark attributed Soul Cultivation Technique respectively.

Davis decided to train in both since he has both the light and dark attributes.

…...

"There are many other Battle Techniques as well, but once you learn all these by yourself, even if you learn other techniques, it may not be much useful."

"So what you are doing when you are in my study is, secretly practice it. Now memorize these techniques. I'll stay here looking around."

"Is it truly ok? If I get caught, you will be the one facing trouble…while I might possibly die."

"It's really fine. Even if someone got a complaint, it will have to go through my father. My father is the only problem though. Well, I'll handle it at that time." Davis casually replied.

'Is he thinking that he is above everyone else in the Empire?' Though she was really happy and thankful towards Davis, she couldn't help but think that if he is an idiot.

Davis would vomit blood if he knew what she was thinking right now.

They stayed at the Library for a few hours.

Davis saw many miscellaneous Battle Techniques. He took liking to some of them and memorized for training in them later. For example, the Family Disabling Palm, which is aimed at one's kidney. It immediately ruins a person's ability to use his ding dong and renders it useless.

Another one is Meridian Crippling Palm, which cripples the Essence Gathering Cultivation of the target if one is able to successfully sever the meridians.

Davis got really interested as he thought of using the Family Disabling Palm on his father, but after a moment of contemplation, he thought that it was too cruel to his mother so he let go his evil idea.

But still, he decided to learn this techniques as it might be quite useful in this world.

As he just finished memorizing those Battle Techniques, he went to look for Ellia.

Just as he saw Ellia, he was surprised.

"Davis told you learn here you say?" A little kid about 5 years old with a cold gaze questioned.

"Yes, Prince Davis told me to learn Battle Techniques which he recommended personally." Ellia looked left and right, waiting for the arrival of Davis.

Once she caught sight of him, she shouted.

"Prince Davis!" "Brother!"

They then both looked at each other.

..."Haha, Clara, I was just about to visit you."

"Hmph, you didn't visit me for a week."

"How could I? Didn't mother take you to tour around the Royal Capital for a week?"

"Yes!" Clara's face brightened up.

After that event, the relationship between Clara and her parents got normal again. The true reason they brought her out was to not let Clara find out about Davis's punishment or else things would rather turn awkward between them again.

Davis also didn't tell about that to Clara as he had a tacit understanding with his mother. He didn't want to create problems either.

"Good! Come, let me introduce you to my personal maid, Ellia." Davis patted her head.

"Ellia, this is the First Princess, Clara Loret, my little sister."

"Ellia pays her respects to the First Princess." She bowed down gracefully and smiled.

"Personal Maid? No wonder she would say that you told her to learn here." Clara nodded her head in understanding.

"But that doesn't warrant a maid learning our Sky Grade Battle Techniques, let alone stepping into the Castle Library. And the way she calls you Prince Davis, it's almost as if she is acting." Clara narrowed her eyes and gazed at Ellia like a hawk eyeing it's prey.

Ellia's smile froze and looked at Davis for help.

'Such accuracy! Scary!' Davis thought. She only heard a single time but managed to see the deceit in it.

"Haha, that's my sister, honestly you have the potential to become a detective but I won't talk about that right now. You see, Ellia is my friend and she calls me Davis."

"A friend? Not a maid?"

"Both…"

"What!? Which is first?" Clara looked at Ellia and asked with anger.

"Huh… I am a maid, then a friend." Ellia answered truthfully. She had no idea but thought that she should not lie to this person.

"Brother! She seduced you!" Clara shouted, stood in front of Davis and blocked him from Ellia.

'Eh? Isn't that the opposite?' Ellia cried mentally.

Davis facepalmed.

'This is gonna be an headache.'

"Erm… Clara, it was I who told Ellia to call me Davis. I wanted her to become my friend you see…"

"How can a royalty lower oneself to be friends with a maid? Brother, this is atrocious and disgraceful!" Clara looked at Davis and shouted furiously.

Ellia put her head down in shame. Her official identity still was a maid.

'Ah my life as a personal maid is going to end, probably even my life.' Ellia thought ruefully and was a little scared of separating away from Davis.