DxD: A Blonde Boy

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"Alright, Martha, Since I can't use magic, I can't teach you how to wield it but luckily I've just got you a magic teacher." Naruto pointed at Rossweisse.

"She's supernatural too?" Martha asked in surprise.

She's seen Rossweisse in school numerous times and she looks nothing like a supernatural being. Could pass off as human anyday.

"Hi, Martha. I'll be teaching you how to control your magic from today." she replied with a gentle smile.

Though Naruto's request was a bit rushed, she was more than happy to help him in any way she could.

"Yes, Sensei."

Issei and Rias raised an eyebrow at Martha. Since when did Martha become one of them? Rias couldn't feel anything from her while Issei felt a faint dark energy within her but paid no mind to it thinking his senses were playing games with him but this time around, he was sure his senses weren't playing games with him.

"So, what kind of magic do you use?"

"Um…" Martha glanced at Naruto who reassured her with a nod. "...Demon magic."

"Oh… Demon magic?" Rossweisse glanced sideways at Naruto—a perplexed look marring her face—who shrugged in return.

The more she knew him, the weirder he became.

Rias stared at Martha, her gears shitting as she scrutinized the pale blonde-haired girl. She was already connecting the dots one by one as she glanced between Martha and Naruto and John. Those two were definitely siblings with their shared distinct features and she's never seen Naruto with any other human than these two.

"Alright, Rias, I need you to erect a magic barrier as far as you can."

"Yes master." Rias replied with a strained smile.

"What's this, Naruto? Why are you bullying a little child?" Gaia asked, wondering why he didn't ask her instead.

A magic barrier made by a goddess was far more powerful than a devil.

"I can't help but notice she refers to you as 'master'" John added with a drawl.

Rias' eyes twitched at Naruto's older sister calling her a child. The arrogance ran in the family it seems.

"She brought this upon herself. That's all you need to know.

"Go, get us some refreshment and take your time." Naruto ordered with an infuriating smirk plastered on his face.

Rias grit her teeth in frustration, at this rate, she would definitely faint from anger. Calming down with a deep sigh, she metally swore vengeance before she gave a robotic reply and left.

"So… Um, Martha, do you mind demonstrating your magic?"

Martha blinked in surprise before she got to work. Her face contorted in concentration as she stretched her palms forward but nothing happened.

"You're going about it the wrong way." Rossweisse chuckled. "Okay, I'm going to shoot a fireball at that tree so watch closely."

Naruto perked up at the words 'shoot' and 'fireball' from the wooden lounger he had created earlier.

Who's shooting who exactly?

Issei beside him, stopped fanning him with a huge leaf he got from god knows where in favor of staring at his current homeroom teacher in action.

A magic circle formed in the air with a few hand gestures, the runes slowly rotating in the air in front of the Valkyrie.

"This is an elemental magic array. The blueprints of arrays are embedded into your magic itself. You instinctively know how to draw them but control is very important when executing your techniques. Of course you can create your own unique magic arrays which are much more advanced than anything you can do right now."

Rossweisse pumped a good chunk of her magic into the seal and it enlarged rapidly before it shrunk to the size of her finger when she withdrew the amount of magic in it before it turned back to its original size and a fireball, the size of a basketball, shot out from the magic circle and consumed the targeted tree.

"Ah, I see." Martha exclaimed.

"Can I do this too?" John couldn't help but question.

Gaia nodded her head in approval at Rossweisse as she instructed Martha on how to channel magic. For a youngin, she was doing just fine teaching the mechanics of magic.

"Magic…" Naruto spat distastefully before the roar of a fireball came to life beside him. It was quite a spectacle as it was massive towering over the caster who of all people was Issei.

An elbow to the gut made him lose his concentration as the fireball lost its spark.

Issei held his stomach in pain rolling off the floor.

"Freeloader." Naruto said with a hoarse cold voice glaring at Issei on the ground.

Martha closed her eyes and took in a deep breath. She stretched both palms forward, her brows wrinkling in concentration. Her mind's eyes could see the ball of purple energy closing around inside her.

Naruto perked up in surprise as a purple magic circle slowly materialized in front of Martha's outstretched palms.

"Haa!"

'Open your mind, Martha."

Martha could see, even with her eyes closed, a single line drawing an intricate interwoven pattern before it lit up in fire. On the outside world, the magic circle began forming slowly like a mechanical part, similar to Ashirok's, but with each stroke, the magic density and temperature in the vicinity arose.

Naruto narrowed his eyes in premonition.

John's sacred gear materialized into his hand, a purple aura surrounding him.

Gaia's face went blank as green thin mist slowly surrounded her.

"Martha, that's enough!" Rossweisse screamed over the scorching heat emanating from her magic circle.

Purple eyes snapped open, an excited look appearing on her face when she saw the light purple color her magic circle had become.

"Too much magic." Gaia commented.

"Too much?" She felt like the amount of energy she fed the circle was well within tolerable range, like casual.

Martha inadvertently disrupted the flow of mana flowing into the circle when she tried control the flow of her energy and the ambient mama went into a frenzied Naruto

Naruto performed a smokeless kawarimi on Martha in the twinkle of an eye. The magic circle which would have normally been snuffed out except the staggering amount of mana put into it begged to be unleashed, a bright white light filling the clearing all of a sudden, a deafening humming sound accompanied the light.

"Hiraishin: Guiding Thunder."

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