Description
This drawing is of Rin Tohsaka from the fan-fiction story "From fake dreams" [link] written by ThirdFang.
She is a slightly more experienced and skilled version of Rin Tohsaka who can wield her jewels and the Jeweled Sword Zelretch to a slightly higher degree then her original counterpart.
Jeweled Sword Zelretch [link] It's a ritual dagger with a jeweled blade, an alien technology embodying general knowledge from a far future, beyond the reach of modern man. Archer cannot tell the magical theory that constructed it even with all of his knowledge. Zelretch carries the original, and he has left blueprints of the sword with the Tohsaka family as a sort of long-term homework that he expects will take many generations. Like normal Mystic Codes, it is only able to be used by him and those of his lineage. It is the tool with which he pushed back the mirror image of the moon by utilizing it to create a virtually limitless Ether Cannon unleashed through a Magic Square, a special magic circle.
The sword is capable of the Multi-Dimensional Refraction Phenomenon, allowing the user to draw in potentially infinite magical energy. The kaleidoscope-like jewel blade creates a small opening to the same area in another parallel world, though any further interference is impossible, and it draws in all of the magical energy from that space. Magical energy channeled into the blade can be fired off in a blinding stream of light. Also, as a jewel, the sword can also be detonated as a one-shot explosive. The sword is created during the 5th Heaven's Feel ritual by using the blueprints, Tracing (Advanced Projection), and Illyasviel von Einzbern's inherited memories from Justica of Zelretch's original sword. The sword is inferior to the original, and with it she assisted The 2nd Magus Killer in ending the ritual. Due to this, Tohsaka Rin is better able to grasp the blueprint and theory, generations ahead of when Zelretch expected, though it will take decades and numerous resources to reproduce it. (info from type moon wiki)