Contract with Charlotte.

She needs to sacrifice her humanity to stay with him. "Little Brother can you merge me with my Spirit and make a contract with me? I don't want to be separated from you."

Nie Long tries to persuade her to not too since she will no longer become human, but this is all according to his plan. He already knows Charlotte has feelings for him and she will make the said contract with him. Keikaku Doori.

Charlotte doesn't know that he already planned this out. He already knows her feelings for him and he takes advantage of it. If this secret was told, he might get scolded by her and she might hate him, but if she doesn't know, it is alright.

He never told his other Martial Spirit about his plan, so no one knows it except for him.

Nie Long knows that she is a genius for her school but she doesn't have the qualification to call herself a genius since the true genius is in front of her.

Charlotte is an orphan at was raised in an orphanage in the City. When she awakens and her talent was known to others, they take her to the Academy inside the City and she becomes known as a genius.

"I don't have a problem with you making the contract with me, but are you sure you want to abandon your humanity just to be with me?" said Nie Long.

Charlotte blushed a bit and nodded her head slowly. She doesn't want him to see her blushed-up face. She takes a long breath before looking back at him.

"We will make the contract first," said Nie Long. He begins making the contract and lets Charlotte sign it with her blood. After finishing making the Contract, she became intangible and went inside Nie Long.

There she saw a Five-Tailed Fox sleeping, a Big Tree, a Red Coloured Crow and a Beautiful Sword. The other also saw her and know that she is the 5th member of Nie Long's Martial Spirit.

Nie Long calls her out of his Inner Space. "Take out your Martial Spirit Big Sister, I will merge it with you and make you Potential to reach God-Rank Potential." She followed his command and take her Martial Spirit out.

He then uses Monster Merging to merge Charlotte with her Martial Spirit. This Monster Merging is more than merging monsters, it also can merge other things too. What an OP ability to have.

After waiting for 5 minutes, Charlotte came out as a new person. She has long golden blonde hair, which is in a braid, and there was a grass decoration placed on her head. Being an Elf she has long ears which are tapered to a point. Her neck, her torso, and her limbs were all long and narrow. She has large breasts.

She looks exactly like Shera L Greenwood from Isekai Maou to Shoukan Dorei no Majutsu (How Not to Summon a Demon Lord).

Nie Long thought that if she become an elf, her breast might shrink since all he knows are flat, but luckily she have large breasts. She begins inspecting her body and looks around.

"Why are you looking around Big Sister?" asked Nie Long while looking at her ethereal look. "Did you not see these things flying in the air, Little Brother?" Nie Long shook her head.

"Maybe I can see it if I use Spirit Possession on you, Big Sister," said Nie Long. She nodded her head and then look at him playfully. "How is my look now Little Brother? Am I becoming more beautiful right?" asked her playfully.

"Yes you were already beautiful before but now you look like a fairy fall from heaven," praised Nie Long. Nie Long no longer blushed from interacting with Charlotte, since he already spent 5 years with her.

"Big Sister come back into my Inner Space. I will try Spirit Possession on you," said Nie Long to Charlotte. She nodded and went back to his Inner Space.

"Spirit Possession," said Nie Long while thinking about Charlotte.

He then look around and saw particles of light green, dark green and yellow light around him. Nie Long look inside his Library and read about the particles around him.

These particles are Spirits and they are attracted to him since he uses Spirit Possession on an Elf. Light green is Wind Spirit, Dark Green is Wood Spirit and Yellow Light is Holy or Light Spirit.

An Elf will be known as an elf if they have this element. There is rarely an Elf that has other elements than this.