Just putting this here for ya':
His name is Lawliet Einstein, called "L" for short in both the narrative and by himself. He is a very, very, very far flung future descendant of Albert Einstein, and the only other member of the line to ever inherit Albert's brain map, making him a hyper genius by today's standards. It should go without saying, naturally, that L is also a scientist and inventor, except in the future he belongs to science is a far more broad topic, now including magic(Enchanted Particle Theory) and other things that we today consider supernatural.
As of current, he is something of a mad scientist and criminal on the run from just about every galactic government there is, be it for crimes he's committed(Black Arms dealing, murder, grand theft, war profiteering, terrorism, inventing and selling weapons of mass destruction, illegal experimentation, just to name a few), or to gain access to the secrets of his inventions, which in his timeline could propel a planet or species hundreds or thousands of years into the future, in a vein not unlike Rick Sanchez from Rick and Morty(actually Rick is a large inspiration for this char). None of this is to say he is outright evil though.
From the sheet, his personality reads as follows:
"On the one hand, L is a genius scientist and inventor of almost preturnatural proportions, blessed by the genetics of his line with an intellect and acumen for mathematics and the sciences unmatched by any of his contemporaries be they present or past(save for Nikolai Tesla, whom L believes was the smartest man to have ever lived). His accomplishments in these fields are as exhaustive as they are impressive, and he rarely leaves a room of people without convincing them he is the smartest there first. He is surprisingly charming and social despite some of his more apparent character flaws, and places learning new things on the height of his list of priorities. He is first a man of science, and a man second, a recurring theme in his life which impacts many of his decisions and thoughts.
On the other hand, L can also be incredibly dangerous, emotionally and mentally unhinged, and is a generally unpredictable man. He can be rather Machiavellian in his dealings with others, using his charm and his silver tongue to manipulate others to his cause. His vast level of intellect and strange star-hopping experiences and adventures have made him jaded, arrogant, somewhat nihilistic, eccentric, and outright antagonistic to others at times. Despite this massive intellect, on a cursory glance most people do not assume as much about him due to his sluggish posture, often silly disposition, and his habit of being predisposed to alcoholism and the use of other, often experimental drugs of his own design.
In terms of morality, it is often difficult for others to pin this facet about him down, as it is surprisingly fluid. In the past he has been just as willing to put down an entire planet for fear of some uncurable galaxy-spanning disease spreading as he was willing to invent a cure for a little girl suffering from a terrible affliction. In this sense, L does not have a traditional moral code. He seems to, in general, possess a disregard for life(including his own), more than willing to take it from others if he needs to in order to accomplish his goals. While this may be true, it is not to say he is a completely empty shell.
L is not a psychopath - he can feel emotions such as guilt and sadness, and pointless death(if in significant numbers) does inspire shock, awe, and even regret within him. He does not believe in killing the innocent or uninvolved if it can at all be avoided, but at the same time is a prominent supporter of the line of thinking "you can't make an omelette without breaking a few eggs". In summation, at his core L is a broken but good man, inspired to help others, but these greater callings can often be smothered out by his selfish personality, and cold calculating mind."
In terms of abilities, he doesnt really have any traditional ones. Instead, his capabilities are separated into Cybernetic Enhancements, and Bio enhancements, with the former acting a lot closer to standard powers youd see on other characters. For example, L has a surgically implanted "Ether-Receptive Mesh", an unstable, fibrous metameterial that interfaces with a form of energy called Ether, which in turn allows him to gather ether through the mesh and use it for whatever purposes he may need. An example of his bio-enhancements is "Metagenic Enhancement", which is just your standard superhuman strength/speed/endurance that separates your character from normies. It also disallows him to be effected by diseases, allows him to manually control his senses, faster reaction times, all that good jazz.
In terms of equipment, he has tons of various gadgets(like his exploding jacket), and has an ability that essentially allows him to tranmute and alter existing matter into other things(like weapons, gadgets, etc) but his flagship equipment would be the Symbiote(see Venom from Spider Man) he has a symbiotic relationship with, acting as an amorphous, psychoreflective skinsuit/power suit, his Bi-barrelled handgun Icarus which fires destructive energy blasts or solid munition, and his sword Esoterica which is basically his soul and the symbiote fused together, giving the soul strange properties like weight, an edge, the ability to cut magic and the like.
And.... Thats just about all the important stuff you'd need to know. Feel free to ask specifics.
Edit: He can also create and control machines of varying complexities, and also has minimal psychic capability as the parent ability to the technomancy, such as kinesis, telepathy, and psychometabolism.
He has a supercomputer embedded in his head(dubbed "Ordus"), a supercomputer in his glasses(dubbed "Raziel") and a "Geomantic" computer is disguised as his wristwatch, which is just a fancy way of saying he has a cool magitech wristwatch that lets him use a couple of spells.