Rick Prime.

Rick Prime lives in a super large futuristic technological base. Rick Prime knows some Ricks are looking for him, so this base is in a universe outside the "infinite central curve" (a wall that divides multiverses).

Rick Prime also has thousands and thousands of clones of himself who live and die for him so they never die because they are all the same.

The original Rick Prime is in a chair inside his base connected to all his other clones, this allows him to see countless places at once as if he were a spectator or as if he were GOD.

Some of the technologies that Rick Prime has developed include:

The Omega weapon, the portal press, clones, teleportation, plasma energy weapons, etc., super-advanced robots, nanotechnology, flight technology, cloning, ice-freezing weapons, time-stopping controls, bombs capable of destroying entire planets, gigantic war machines, regeneration (it is a technology he has in his body that makes him regenerate damage of all kinds), shields, force fields, body modifications.

Among many other things.

Rick Prime is an old man over 60 years old who, thanks to his technology, manages to preserve himself well, although he could completely rejuvenate himself but doesn't want to. He is also 1.82 meters tall and has a somewhat pale and grayish skin.

He wears a dark navy blue jacket with futuristic silver patterns along with a blue vest with red checks, futuristic military black pants, and his hair is blue with a spiky hairstyle.

Rick Prime is over 60 years old, has the appearance of an elderly man, his body is thin with a somewhat pale and grayish color, and he is 1.85 meters tall.

Rick Prime is a megalomaniacal, egomaniacal, apathetic, and twisted humorist who enjoys making fun of others.

He feels superior to everyone and everything; all he wants is to be eternal, practically like a god.

He feels nothing for anyone, or at least not in a normal way, since sometimes he becomes attached to characters who would not have anything special for him and yet kills them and doesn't care what happens to them just because he wastes time.

Rick Prime has a very stale, twisted, and random sense of humor.

His hand doesn't tremble when it comes to killing anyone, although depending on the situation he prefers to play with the person he wants to kill before doing so, or simply doesn't kill him because he considers him inferior.

Rick Prime appears to be crazy, disheveled, and psychotic, but while he is, he is also quite cautious and calculating, and although he acts like a psychopath, he is always aware of everything.

He tends to laugh a lot.

He's always making witty, cynical, and sarcastic jokes.

Rick Prime's family is nonexistent since both his daughter and wife are dead, as he himself killed his wife Dayane in the Omega weapon and his daughter died many years later after an apocalypse on the planet of his dimension.

But most Ricks' families in the multiverse, besides their daughter, also include:

Morty: Morty is Rick's grandson, a somewhat clumsy and easily frightened 14-year-old boy who is the faithful companion of all the Ricks in the multiverse.
Morty is always the one who follows the Ricks everywhere on every adventure they have.
Since these two already have a grandfather-grandson relationship of camaraderie and trust, partly due to the crazy and intrepid personality of most Ricks, although not Prime Rick, since Prime Rick's Morty is actually with Rick C-137, which he doesn't mind.

Rick is a direct descendant of the blood of several geniuses like Albert Einstein. Most Ricks had a wife (Dayane) and a daughter (Beth) and were just a normal adult living with their family and making incredible inventions in their garage, before they discovered the portal gun.

Instead, Rick Prime abandoned his daughter Beth and his entire family. Rick Prime didn't care about any of that; unlike other Ricks, he only wanted to look out for himself and seek to be eternal because of his enormous ego. It was then, when he discovered the portal gun, that he decided to abandon everything to execute his plan of the infinite Rick.

But there was a problem, while most of Rick accepted the gun, a few rejected it (among them his nemesis Rick-137 and the second most intelligent Rick).

Prime realized that the best way to get all the Ricks to leave that "soft" side (according to him) was to create the Omega Weapon, a huge and powerful machine capable of destroying any being inside it in absolutely all the multiverses.
With this weapon, Rick Prime killed all the Beths (the wives of the Ricks) in the multiverse, thus forcing all the Ricks to search for another one with the portal gun, but there was no Dayane left.

Rick Prime is now being hunted by many Ricks across the multiverse because of this, something that amuses him. Among these Ricks searching for him, there is one in particular who amuses him more than all the others: Rick C-137, the second most intelligent Rick in the multiverse. Unlike the others, this Rick created the portal gun himself, without Rick Prime giving it to him. This is how Rick C-137 came to seek out Prime to kill him for what he did to his wife.

Rick, or Rick Prime as he is known to everyone and as he proclaims himself, is one of the multiversal variants of the same person, that is to say:

An old human scientist who was the smartest on Earth, who after discovering "the portal gun" managed to travel anywhere in the infinite multiverse.

Rick Prime was the first Rick to travel between multiverses and he was responsible for the other infinite Ricks also being able to travel, since Rick Prime went to an immense number of universes giving the portal gun to each Rick of each universe to give them the ability to travel.

Rick Prime is the most intelligent Rick in the entire multiverse and is a super narcissistic psychopathic scientist who has no connection with anyone. The only reason he gave the portal gun to other Ricks is because he wanted to create the "infinite Rick".

So all the Ricks were like him (apathetic loners who believe everyone is replaceable)

Thus, in his twisted mind, he would know that everyone had become like him, and thus he would be eternal.

which I achieved, since most of the Ricks who accepted the gun became like that.
But to the Ricks who rejected him, he killed the wives and daughters of each Rick, in order to keep them obsessed with finding him.