My Sister is a Genius

"HYAAA!" Risa swung her wooden sword at a wide angle. The swing was crude and lacking strength.

Bok! 

I blocked it with my own wooden sword. My right hand, my dominant hand, was behind my back. 

"HYAA!" She swings once again, this time, it is quicker and the angle is tighter.

Bok!

I block it again with no effort.

Risa notices how ineffective her swings are and takes a step back. She circles to my right side and takes a quick shot at my shoulder. 

"HA!" It was a stab instead of a swing. I react quickly and do a wide swing to intercept it. 

Bak!. 

That was close. I was able to stop her last second. Having the hand that was best with a tie away is rough. 

Seeing me block this too, she backs away. Her cute and pudgy face frowning like that makes me want to laugh. 

"Hahaha!" And laugh I did. 

"Gah! Why are you laughing at me, big brother?" she says in her soft, complaining voice. 

"I'm not laughing at you. I'm laughing at myself. If I knew my little sister was this compatible with the sword I would have taught you earlier." I said. 

I couldn't tell her the real reason or my food would be stolen during lunch. Risa has a bad habit of robbing her favorite dishes off of other's plates. 

As much as we would like to stop her, her face when she is eating is so cute. We can't help but let her do as she wishes. 

"What does compatible mean?" she asked with a confused look. 

"Ah, my bad." I am embarrassed. I forgot she's only 7 and her vocabulary isn't that great yet.

I clear my throat and say "It means that you are a genius!" 

I say with pride and enthusiasm. It's her first day with the sword and she has quickly.

She learned to adjust the angles at which she should attack and what vulnerabilities she should target. She even has light footwork. 

Her creativity is a bit lacking and her reaction time could be improved. 

Regardless, she could be considered a minor genius. 

"A genius!" Risa's eyes widened with surprise. She creamed with excitement and started jumping up and down. 

"A genius! A genius!!" she yelled as she ran around swinging her sword haphazardly. 

her green eyes looked at me with joyous expectation. 

"Teach me more! I want to beat big brother up!" she demanded.

Where did she learn "beat up" from?

I was scared for a moment, she does have talent. With enough practice and the right technique, she could become just as good as me or even better. 

I didn't want to get beat up by my little sister though. That would be embarrassing as an elder brother. 

"By big brother, do you mean me or Jonathon." I asked. 

"Big brother Jon." she said with a snort. When did she learn to snort?

I'll ask Mom later. I can't let my cute little sister be influenced like this. 

At least she wasn't trying to defeat me. It seems like she holds a grudge against Jonathon. 

'Why?" I ask her as we sit down on the ground. It was time for a mini break. 

"He doesn't play with me anymore." she said, with a hint of sadness. 

I smiled at her response and proceeded to ruffle her glistening black hair. 

"Hmm." she smiles in satisfaction. It always helps get that sadness off her. 

I pick up the little girl who is oddly heavy for her age and place her on my lap, facing away from me. 

"Jon will be back, You know he gets bored of everything except one thing. Do you know what that thing is?" I say softly. 

"Playing with me!" she replied with rejuvenation. The energy she has never seems to hide for long. 

She gets off my lap and picks up her small wooden sword. I smile widely as her enthusiasm for the sword is even greater than mine. I am glad I decided to teach her early. 

Even if I lose to her many years in the future, I would not be frustrated that she surpassed me. I would congratulate her on her achievement. 

As a brother, there is nothing greater than seeing your siblings succeed. 

We begin training again as I start instructing her in earnest. 

"Lower your arm a little more and angle the blade slightly downwards.

"When I did the wide swing, you had to dodge. Don't meet someone with harder swings head-on. 

Good. Keep probing and making space. 

Instead of backing off, you could slide. Your opponent will be caught off guard. They will reveal a gap and you can stab them from underneath."

Bak! Bok!

Thwak!

Swish! Thuck! 

She has always been a good listener. The rate at which she was taking my instructions and adjusting her stance was incredible. 

Her movement was becoming more refined as she was able to have more variety in her swings. She was spinning, sliding, and swerving with finesse. 

She even incorporated her movements with her strokes to increase their force or lethality.

It felt like she was unconsciously using momentum and other properties of psychics to maximize her output. 

I didn't even need to tell her these things. All I had to do was point out her mistakes and give suggestions for slight improvements. 

She was already better than 90% of beginner swordsmen in a day. 

"That's enough for today. You need a bath." I said while swiftly grabbing her sword with my now free right hand. 

"No! I want to fight more!" she said, reaching for her sword. 

I lifted my hand and put it high above me. 

'Ugh! Give it back." she yelled. She was jumping up and down, trying to take the sword back. Unfortunately, she wasn't even half my height. 

There was no way she could take it back. She gave up very quickly when she realized it. 

"Look at your clothes and hair." I said. She calmed down and took a look. 

She was covered in the sandy dirt of the training field. I had made her fall multiple times as I always used just enough force to drop her. 

Her hair was also messy and dirty. her face was covered in hours of sweat. 

I on the other hand was pretty clean. she didn't even land a single hit on me. The difference in experience, size, and strength was too great. 

"I'll take you Mom. It's almost time for lunch." I said while picking her up and hoisting her on my back. 

Her legs dangled down my shoulders as her hands held onto my neck. 

"To mommy!!" she commanded me.

I chuckle and reply in a subservient manner "Aye aye, captain!" 

(BTW, there are pirates in certain parts of the continent.)

...

I drop off my sister at my parent's residence. Looking at the state of her daughter, my mother started beating me with a spatula. 

I didn't resist the assault. She got sauce and vegetable bits all over my clothes. 

My father came in because of the commotion and laughed at me. He then told my mother that this was probably going to be a daily occurrence. 

Mother reluctantly stopped beating me and took Risa for a bath. When she was gone. I told my father about how talented Risa was with the sword. 

I told him how her combat awareness was the best I've seen, probably better than mine. 

"Do you want me to ask the elders for a body fortification pill?" he asked solemnly. 

"That would be for the best. I know is small and hasn't started cultivating man yet but she should start soon.

It would be even better if they could give her an enlightenment pill or even an awakening pill." I replied. 

The pills we were talking about were pills that could be used by anyone whether they they had cultivated mana or not. They helped with increasing physical strength or mental acuity permanently. 

Any tier being could use them, they were best used before one started cultivating. 

They would allow Risa to cultivate much faster and have enough physical strength to actually put up a fight during training. 

Unfortunately, the pills could only be made by high-tier alchemists, all of whom were elders. 

"Even if they agree, we will need to source the ingredients. They are currently being bought up imperial family in preparation for the war." Father said as he rubbed his chin. 

Not only were the pills hard to make, but the ingredients were very rare. With the imperial family hoarding them for the war, this was the worst time for us to get them. 

"I'll contact my school. I'll see if I can use the merit points I have to get some." I suggested. 

Even though I left the SSS (Supreme Sword School), I contributed a lot to the school during the war. They gave quite a significant sum of merit points to that. 

These were points I could use to exchange anything they had available in their reward vaults. They often had rare herbs or even pills inside. I would contact them to see what they have at the moment and if I could afford what she needs. 

"You do that. I'll send a message to our foreign collaborators. See what they have." Dad was going to see if our contacts in other nations had anything.

That wasn't a bad idea as some of them also ran significant herb-related businesses. 

I then told Dad that we would speak after lunch and that he would tell Mom about Risa's genius. 

I need to take a bath and change my clothes. Mom had lathered them in food. 

I headed back to my place on the estate and entered the shower. I took off my black shirt and tossed it into a basket. 

The maids would come later to pick them up for washing. Just as I was about to take off my pants, my senses tingled, and a shiver went down my spine. 

Swoosh!

The door to the bathroom, which I thought I had locked, swung open. A familiar figure with blond hair, blue eyes, and a heavenly face was standing there. 

Elina with a strange expression on her face was staring at me. Before I could say something, she pounced on me. 

I fell to the ground as she lay on top of me. She slowly rose while her gaze flickered all over my body. 

The look in her eyes was that of a predator scrutinizing its prey. I fierce look that I had never seen in her. 

Her gaze quickly settled on my abdomen. She took her left index finger and caressed my abs in a sultry manner. Her expression turned even more wild than before. 

I was completely in shock., frozen by the impossibility of what was happening. 

"Hmm, she has had such a nice toy with her all this time but never played with it. I need to teach that girl how to have fun." I heard her say but my mind was foggy. 

Elina spoke in a coquettish way. Her face carried some inexplicable charm. It was the same as usual, soft and alluring but right now, it had something more. 

Some sort of fatal attraction was welling up in me. I felt like I would lose my mind and do something I would regret for eternity. 

No, Elina isn't like this. I am not like this. Without obeying my mind, my hands were reaching for Elian. 

They softly touched her legs and were sinking their way up. 

Shit! What the fuck is going on? I try to stop with all my will. I could feel my scrunching up in unwillingness. 

My hands make their way up her arms next and go all the way to get her face. 

Elina smiles widely, different from her usual smile of joy. This woman, she can't be Elina. 

That smile was the final straw. My body had risen to meet her face to face. My hands cupped her face as she sat sexily in my lap. 

My face got closer and closer to hers as my hands held onto her face tighter. Just as our lips were about to meet, I stopped. 

I forced out a smile and said "Get the fuck out of her you bitch!" 

Her smile fades when I say this. Before she could react, I jerked my head backward and then right back to her face. 

Our foreheads smash together as I headbutt her to oblivion.