I, Rin Tohsaka, Will Be a Demon God in Type-Moon

Jewel Magecraft: The Tohsaka family's hereditary magecraft, passed down from the Jewel Old Man. It is a general term for magecraft that utilizes jewels. Jewels easily accumulate the holder's intent and can readily store magical energy. Particularly, minerals that have slumbered deep within the earth for extended periods can easily form nature spirits. Jewels with attributes are themselves simple magical imprints. Jewels imbued with nature spirits of fire can be easily ignited by injecting magical energy, and the same applies to earth, water, wind, and void.

False Fairy Tale Magecraft (Man-eating Witch): An obscure branch of occultism. In battle, it summons the witch from Russian folklore, the "Man-eating Grandma of the Chicken-Leg Hut." As the Man-eating Witch controls the "Water of Life," which grants eternal life, she possesses astonishing regenerative abilities, capable of instantly regenerating even if half of her body disappears. The regrown parts become plumper, more lustrous, and more vital than before.

Magecraft: Flame Sword, Witch-King Slayer, Idler Dispersion, Mirage, Jewel Magic Bullet, Healing Magecraft, Reinforcement Magecraft, Man-eating Grandma of the Chicken-Leg Hut, Water of Life.

Host: Rin Tohsaka

Age: 11

Attributes: Five Great Elements

Strength: E/C+ (Starlight Form)

Endurance: E+/A+ (A+ when fully charged with magical energy and using Water of Life)

Agility: E+/B (Starlight Form)

Magical Energy: C+/B (Starlight Form)

Luck: ??

Noble Phantasm: Speed-Writing Codex, Jewel Sword

Magecraft Rank: B

Magecraft Fields:

Celestial Magecraft: This field was acquired through research on the Aztec "Tlahuizcalpantecuhtli's Spear." It derives various applications by gathering the light of Venus through jewels or reflecting it. Furthermore, when combined with False Myth Magecraft, it allows the user to manifest the Starlight Form by borrowing ancient starlight!

Runic Alphabet: The Runic Alphabet consists of twenty-four magical symbols representing "mystery" and "secrets." It is a magical language used by Germanic peoples since the second century AD and is the origin of Old English.

Jewel Magecraft: The Tohsaka family's hereditary magecraft, passed down from the Jewel Old Man. It is a general term for magecraft that utilizes jewels. Jewels easily accumulate the holder's intent and can readily store magical energy. Particularly, minerals that have slumbered deep within the earth for extended periods can easily form nature spirits. Jewels with attributes are themselves simple magical imprints. Jewels imbued with nature spirits of fire can be easily ignited by injecting magical energy, and the same applies to earth, water, wind, and void.

False Myth Magecraft: A new magecraft field, elevated by combining prior knowledge of Fairy Tale Magecraft with knowledge related to Servants.

Magecraft: Flame Sword, Witch-King Slayer, Idler Dispersion, Mirage, Jewel Magic Bullet, Healing Magecraft, Reinforcement Magecraft, Man-eating Grandma of the Chicken-Leg Hut, Water of Life, Temple Creation... (The rest is omitted. If readers wish for a detailed explanation, please leave a message in the comments, and I will add it when I have time.)

Section 5, Chapter 4: Rin Tohsaka Aims to Become a Demon God - First Battle!

The cold wind of late autumn howled through the mountains, but the back mountain of the Tohsaka Estate felt no chill.

A colossal flame giant roared, its immense pressure enough to make anyone who witnessed it tremble.

"Crush him, Witch-King Slayer."

"Roar!"

With a flick of Rin's small hand, the Witch-King Slayer raised its massive flaming cross and ferociously attacked Kirei Kotomine.

Tokiomi Tohsaka, watching the rampaging flame giant, his spirited eldest daughter, and the clumsily dodging Kirei Kotomine, tightly gripped the jewel and staff in his hands, prepared to rescue his newly accepted disciple and future partner at the first sign of trouble.

Kirei Kotomine, while dodging clumsily, tentatively flicked a Black Key from his hand. The Black Key, quickly imbued with exorcism properties, pierced through the Witch-King Slayer.

Seeing the Witch-King Slayer riddled with holes before him, Kirei Kotomine seemed to glimpse a possibility of defeating this flame giant and continuously threw Black Keys from behind him.

Rin grinned playfully as she watched the struggling Kirei Kotomine, an inexplicable pleasure rising within her. With a wave of her hand, her magical circuits fully engaged, increasing her magical energy output.

The Witch-King Slayer, which had been shot full of holes like a beehive, instantly recovered under Rin's magical enhancement and grew even larger. It raised its massive flaming cross, about three stories high, and fiercely smashed it down towards Kirei Kotomine.

The sudden reversal left Kirei Kotomine with no room to evade, and he could only futilely raise his hands to try and withstand the blow.

At this critical moment, Tokiomi Tohsaka, who was watching from the side, instantly crushed the jewel in his hand. He pointed his staff, and a magical barrier managed to barely block the attack for Kirei Kotomine. However, the Witch-King Slayer still sent Kirei Kotomine flying violently.

Kirei Kotomine was sent tumbling repeatedly across the ground, crashing heavily into a thick tree before coming to a halt.

Tokiomi Tohsaka, seeing the Witch-King Slayer preparing to attack again without relenting, felt a bead of cold sweat trickle down his temple. He quickly shouted loudly at Rin.

"That's enough, Rin! Stop immediately!"

Rin pouted and snorted, withdrawing her magical energy and dispelling the Witch-King Slayer.

Tokiomi Tohsaka approached Kirei Kotomine, who was leaning against the tree, barely able to stand, and extended his hands, which emanated gentle magical energy, to begin healing him.

"My apologies, Kirei. I didn't expect my daughter to be able to wield such magecraft. I hope you don't mind!"

After speaking, Tokiomi Tohsaka showed no hint of apology on his face; instead, it was filled with pride and arrogance.

Kirei Kotomine, clutching his most injured arm, leaned against the tree, his expression still blank. He quietly glanced at Tokiomi Tohsaka.

"It's fine, Master. It's just that my own skills are lacking."

He then looked at Rin, who was approaching, a glint in his eyes, and began to feel curious about this five-year-old girl.

"Rin, just as Master said, you are a genius among geniuses, one who surpasses genius."

Rin stared blankly at Kirei Kotomine. Was this guy a puppet? He was injured this badly, yet he showed no emotion. Should I not have treated him this way? No, he's one of the masterminds behind my family's future tragedy. But wait, maybe I can use this guy. Didn't that Golden Flash easily fool him? Can't I do the same? With that thought, Rin put on a pitiable expression, pretending to be a little girl who accidentally made a mistake and was throwing a tantrum, and said.

"Brother, I'm sorry. I can't quite control my magecraft yet, but you shouldn't have underestimated me."

Whether Rin's pretense fooled Kirei Kotomine or not, Tokiomi Tohsaka believed it. While maintaining the healing magecraft with one hand, he put down his staff and patted Rin's head.

"Alright, Rin, don't act like a spoiled child. I've seen your efforts and your abilities, Father. Our agreement is fulfilled today; Sakura will not be sent away. Furthermore, starting today, I allow Sakura to learn magecraft. Come and help your brother heal."

Rin's happy face was filled with smiles. I've finally changed Sakura's fate! Next is this family. With that, she firmly clenched her small fist, ignored Tokiomi Tohsaka's request, and ran down the mountain without looking back, intending to immediately share this good news with Sakura.

"Dad, I'm going down the mountain to find Sakura. I'll leave Brother in your care."

As Rin ran down the mountain, Tokiomi shouted after her, looking at her retreating figure.

"Rin, Rin, hey! Rin, slow down when you run, be careful."

Then he turned to Kirei Kotomine and said.

"Kirei, am I spoiling Rin too much? Is she too willful?"

Kirei Kotomine looked at Tokiomi Tohsaka, who had a proud look on his face, like an old father showing off his child, and was speechless.

Rin darted down the back mountain. In order to tell Sakura the good news faster, she ignored the soreness in her magic circuits after the battle and even forcibly activated Reinforcement Magecraft.

Rin eagerly pushed open the large door and searched the house for Sakura.

Sakura, who was watching Aoi Tohsaka cook in the kitchen, suddenly heard the noise in the house and curiously poked her head out.

Just as Rin spotted Sakura, she didn't say another word. She scooped up Sakura's head, which was sticking out of the kitchen threshold, and shouted happily.

"Sakura, you'll never be sent away again! I've kept my promise to Dad. Sakura, are you happy?"

Sakura, who was being hugged tightly, couldn't even breathe. How could she answer? Fortunately, Aoi Tohsaka stopped Rin in time, otherwise, it might have been another tragedy.

Aoi Tohsaka turned her head and saw Rin, whose body was covered in patterns formed by magic, rush into the kitchen and hug Sakura's head, shouting happily. Aoi Tohsaka, startled, quickly dropped the spatula and rushed to Rin and Sakura's side, trying to pull Rin away.

"Little Rin, let go quickly! You're choking Sakura!"

Rin suddenly realized something and quickly let go of Sakura. Sakura, finally able to breathe fresh air, couldn't help but cough loudly. Aoi Tohsaka, meanwhile, quickly crouched down, stroking Sakura's back to help her catch her breath.

"Little Rin, what's wrong with you? You're so rough, and you still have Reinforcement Magecraft active."

Rin only then noticed that she hadn't deactivated her Reinforcement Magecraft. She chuckled sheepishly, touching the back of her head, pretending to be oblivious.

"Well, Mom, I was just too happy. I got excited and forgot. Uh, Sakura, I'm sorry."

Sakura stopped coughing and stood up, a happy smile on her face.

"Sister, I'm very happy. Thank you, sister. Sister must have suffered a lot for me, right?"

"As long as you're happy, Sakura. I think from today onwards, I'll be able to see Sakura's cute smiling face again, right! Huh? Mom, your pot is smoking."

"Ah! Not good."

Aoi Tohsaka immediately turned around and, seeing the pot already emitting thick smoke, quickly turned off the heat to deal with it.

Seeing Aoi Tohsaka, who was usually busy and flustered, Rin quickly tugged at Sakura's sleeve.

"Uh, Sakura, let's not bother Mom anymore. Come, I'll take you to the basement to see. We can study magecraft there together from now on."

Sakura smiled sweetly and nodded vigorously, following Rin towards the holy land she had long awaited.

After tidying up the mess, Aoi Tohsaka looked around and found that Rin and Sakura had disappeared. She shook her head with a headache.

"Sigh, Little Rin, this child!"

Matou Residence, in a dark basement.

Zouken Matou, who had been using insect magecraft to monitor the Tohsaka Estate recently, recalled the scene of Rin using Witch-King Slayer just now and let out a few cold laughs.

"It seems that Tokiomi Tohsaka won't agree to transfer Tohsaka Sakura to our Matou family. However, I still have to thank him for producing such excellent descendants! Hehehe..."

Jewel Magecraft: The Tohsaka family's hereditary magecraft, passed down from the Jewel Old Man. It is a general term for magecraft that utilizes jewels. Jewels easily accumulate the wielder's intent and are prone to housing magical energy. Minerals that have slumbered deep within the earth for a long time are particularly prone to forming nature spirits, and jewels with elemental affinities are themselves simplified magecraft circuits. Jewels housing nature spirits of fire can be easily ignited by injecting magical energy, and the same applies to earth, water, and wind.

Magecraft: Flame Sword, Witch-King Slayer, Idler Dispersion, Mirage, Jewel Magic Bullet, Healing Magecraft, Reinforcement Magecraft.

"What is the System's Magecraft Level? And what does C-rank represent?"

"Magecraft Level is a rating based on a comprehensive calculation of average magecraft proficiency across all worlds in the myriad heavens. E-rank signifies ordinary people who possess magical energy or can use it simply. D-rank is equivalent to an apprentice who has just begun to study magecraft. C-rank is the level of an ordinary magecraft user, B-rank is for elites in magecraft usage, A-rank is for masters and grandmasters of magecraft, and S-rank is for those who wield magecraft as if they were gods of magecraft."

"Gods of magecraft, doesn't that mean Demon Gods?"

Thinking of the Demon Gods from the world of A Certain Magical Index, who could alter the universe with a single thought, Rin secretly resolved, I will definitely become a Demon God and bring happiness to Dad, Mom, and Sakura. Rin clenched her fists, making a vow in her heart.

"System, help me exchange for the 'Ogre Witch' magecraft."

"Understood. Exchange complete."

The familiar dizziness appeared in Rin's mind once more.

Time flies.

Over a year passed in the blink of an eye.

February 3, 1994

Rin, having successfully left kindergarten and become an elementary school student, celebrated her seventh birthday today.

Wearing a cute little dress, Rin held her hands to her mouth and loudly voiced her wish to the birthday cake in front of her.

"I wish for Sakura to always be happy, and for our family to live happily together forever."