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Finally, we have the PhDs.
Yuta developse severe masochism, yet they were both Special Grades.
He craves punishments, thus, in this AU, he and Rika defeats Mahito and turns him into their personal "plaything".
Sorcerer Pin, I drew this so I could use it.
It's meant for Rika & Nobara since those girls are my favorite.
You can use it if you want, I don't mind.
You don't even have to give me credit, just have fun.
Then, the Masters.
You can tell that Psychology and Philosophy are her main fields.
This Rika actually survived, or rather, came back from death.
Yuta still became immensely guilt ridden.
But with Rika by his side, his mental state collapses even further.
Every victim will survive for at most a month - a full 31 days before the shrike ability activates and began destroying their innards.
Once they are dead, the infection rate spiked: The smell of blood and corpses alone would be enough to infect them.
==--SPECIAL GRADE--==
Rika makes a simple death binding vow - if I die, this ability activates and infect the person nearest to me, then spread with contact (touching, kissingm sex...) or via blood (mosquitoes, blood donation, bleeding...)
So far, you would be correct in saying that this is barely a Grade 1 or a Special Grade 1 - same rank as Naoya Zen'in.
However, as I am a competent writer, this is how i'd elevate this to befit The Queen of Curses - Orimoto Rika.
Highest Skill Use (Pica Shrike):
The user forces the cursed energy needles to summon inside of a target - vital organs, this requires the opponent/victim to be unaware of the user (Rika)'s presence.
If done correctly, this is an instant kill/ambush ability.
Mid-Level Skill Use (Hedgehog):
The user creates a barrier of needles around themselves. The space around them is permanently "occupied" by porcupine like obstructions, making it impossible for an opponent to strike without being impaled by the user's own cursed energy.
==--ORIMOTO RIKA CURSED TECHNIQUE--==
Simplest Use (Needle Projectiles):
The user manifests physical, invisible slivers of Cursed Energy in a line. They are used like basic ranged weapons or hidden traps in a corridor.
Instead of manifesting solid objects, the user project these super fine needle-like lines of cursed energy.
These "needles" do not trigger defensive barriers like Simple Domains nor Infinity because are "everywhere" but have zero volume.
Based on the concept of a Kakeya set being mathematically "everywhere" while occupying zero physical volume.
This technique will weaponize the Besicovitch paradox.
or complex enough to touch every part of a 3D space. It fills that space in the most "complete" way possible, without actually taking up any real room.
In the end: Hong Wang and Joshua Zahl proved that in three-dimensional space, any such set must indeed have the maximum possible dimension of three.
When mathematicians say the dimension is 3, they are saying that even though the shape has no physical "bulk," it is still "thick"
Samoilovitch Besicovitch discovered what's called a Kakeya Set - a shape that contains a tiny line segment in every direction, yet its total volume can be arbitrarily small, or even zero.
I'm going to give (Adult Human) Orimoto Rika a cursed technique inspired by Hong Wang's joint paper with Joshua Zahl that earned her the 2026 Nobel Fields Medal Award.
The ability is based on this problem:
What is the smallest area required to rotate a unit needle 180°?