I created a Jujutsu Kaisen sorcerer named Julien Vaugrenard. Standing at 6'0, with well-groomed, dark-blonde hair and bluish grey eyes, he's hard to miss, and he's considered highly attractive by female characters, and he does have fangirls among the cast, but not as many as Gojo. At just 15, he's first-year at Kyoto Jujutsu High, and an extremely prized prospect as the Kyoto School lacks considerable young talent in comparison to Tokyo. He's ranked semi-grade 1, the same as his rival Noritoshi Kamo as well as the late Kokichi Muta (Mechamaru), and Utahime Iori, the student supervisor at Kyoto. This means he's under heavy consideration for a promotion. He's the son of Nicolas and Rose, two French immigrants to Japan that run a shop specializing in cheesy pastries. Circumstances have lead him around the block. For one, his parents' dislike for large cities lead them to settle in Muko, a mid-sized city south of Kyoto. Coincidentally, Kyoto is also the site of a Jujutsu school, and though Satoru Gojo is a powerful recruiter, he ultimately chose to stay close to his parents. Second, he required outside training, and lived with his mentor, a special grade sorcerer, the controversial Yuki Tsukumo, in Kyoto from 6 to 12. During this training regimen, they would go to many places such as uninhabited islands. Yuki would joke that there were no witnesses, but this was really so they would not have to hold back. Cheese is at the forefront of his powers, extremely malleable and limited only by his imagination, but Yuki drilled into him what she could - while she carries a Shikigami named Garuda, her power, Bom Ba Ye (translated as Star Rage adds virtual mass to both herself and Garuda. This means she can hit like a speeding truck full of explosives. Julien's participation in jujutsu sorcery was not voluntary originally, as he wished to follow in the footsteps of his parents. Yuki lured a young Julien into the jujutsu world with promises of wealth, status, and leisure, which appealed heavily to him at the time, and still do, though he's adopted more pressing priorities. One of the catalysts was that he discovered she isn't really happy with her life, as her ambitions of creating a world without cursed energy are lofty, and sometimes feel completely unattainable.

 Yuki is not the only person he's acquainted with. He's close with Kasumi Miwa. The two are childhood friends, and Kasumi is not immune to his charm. Kasumi has noticed the opening of a sizeable chasm between them in strength and even status as they've grown and developed together. Whether Julien intends to or not, he is nonetheless a component of an overall environment that leads her to call herself "Useless Miwa." She's very aware that she isn't strong by the standards of a Jujutsu sorcerer, but she's driven to provide for her impoverished family. Julien has earned money fighting curses, and in addition to sending some money to his parents, he also  provides assistance to hers. Kasumi's father, Eizo, once exorcised curses from the family bakery while Julien was away. For this he's grateful to the Miwa family, and they do him. He sees Kasumi as someone he has to protect.
He's friends with Aoi Todo, though their personalities could not be any more different. They were both trained by Yuki Tsukumo, so Julien is well accustomed to the question "What kind of girls are you into?" 

There are three basic applications: Fromage à pâte dure (hard cheeses), Fromage à pâte molle (soft cheeses), and Fondue (melted cheese). The thing is that "hard and soft" are in fact two massive categories, very vague. Ricotta can be considered soft, as can harvati, but they have little in common.  In the beginning of Yuki's training, these techniques were all quite weak, but have evolved into a terrifying arsenal of the unknown.
Fromage à pâte dure, unsurprisingly, is the basis for many of his offensive attacks, and can be used to create constructs that form as hard, solid objects that can take the form of nearly anything the Julien desires. With regards to defense, he has more than one option to choose from, though they are not chosen only by hardness, but how well they can absorb an attack. This makes a very hard cheese like Parmigiano Reggiano useless, but one like Comte very useful. Parmigiano Reggiano's role is almost entirely offensive, the aforementioned fragments of the projectile potentially burrowing inside poorly-protected enemies. The effect is like a hollowpoint bullet. He can shoot this kind of cheese from his back, in a technique called "Quills." It's used typically in dire situations. Julien knows better than to willingly turn his back in combat. These are only some cheeses, some techniques, at his disposal.
Another technique is "Ficello". Ficello is a popular brand of string cheese sold in France, and it involves creating flexible strings that are more like wires. The thickness can be modified, as well as the sharpness.
"Magma" is a variant of Fondue, and Fromage à pâte dure at the same time. The effect is a superheated weapon that quickly solidifies on Julien's command, inside or outside the user's body. He can even make them explode. Fontina, Gruyere, and gouda are commonly used in Fondue and Magma.
Soft cheeses can be used for more strategic purposes, non-lethal techniques, or even a formidable whip.
More techniques at his disposal: "Vieux Boulogne". This cheese is known just for being the worst-smelling. The technique involves creating a pungent and suffocating cheese vapor, which can disorient and impair the senses of anyone caught in its range, as well as their ability to sense and focus their cursed energy. Julien HATES using this technique, but it's particularly effective in enclosed spaces or against opponents who heavily rely on their sense of smell.
His most devastating technique that does not involve Domain Expansion is "Fromage Noir." By infusing his cursed energy into a specialized wheel of black cheese, he can unleash a devastating explosion. There's also a lesser-known variant of "Magma" in which the burns can never heal.
Fromage Fort (sharp cheese) in English. Summons discs of cheddar cheese with significant cutting power. The smaller, the faster. They are of variable size.
More powerful techniques must be charged.
Julien is sophisticated, calm, and collected. He enjoys reading about military history in his free time. If he has eaten a cheese, he never forgets its texture or its properties, and he can incorporate it into his future battles. He enjoys drinks made from fermented whey such as Rivella, but also those that do not compromise or hide the taste. He has a younger sister named Annick.