Rick Prime

He is considered "the real problem" for Rick C-137.

Even though he looks the same as the other Ricks, his level of manipulation, technology, and power set him apart.

Its dimension (Prime) is special because it is considered the basis of the "Central Finite Curve" that isolates Ricks from universes more intelligent than them.

Past, origin and dimension

Origin: Their "home" is the Prime Dimension / Cronenberged Dimension.

At some point, he invented (or was the first to invent) interdimensional travel and the portal gun for Ricks. This gives him power over many other Ricks.

What he did to Rick C-137: It is revealed that Rick Prime killed Rick C-137's wife (Diane) and daughter (Beth), which launched the latter into a life of revenge.

He also used a device called the "Omega Device" that can erase someone from all dimensions and alter memories.

After many years, Rick C-137 locates him, they fight, Rick Prime dies (or is defeated). But his legacy lives on.

General appearance: very similar to other Ricks (blue-gray hair, pale/grayish skin). But he is distinguished by certain details: his grayer skin, "duller" hair, and an "undefined" or slightly different haircut.

He wears: a purple sci-fi style jacket, a gray shoulder pad, a red shirt underneath, and gray-black pants.

Regarding height and weight: the series never provides concrete data (because, remember, it's a multiverse cartoon). So we can't "measure" it.

Build: He looks like an "ordinary" Rick in the form of an old scientist, but not extremely muscular; rather, a typical Rick physique, likely of advanced age.

He is arrogant, nihilistic, narcissistic, with a god complex. He cares about almost no one, abandons his family, and destroys personal ties without batting an eye.

His philosophy seems to be "Ricks are self-sufficient" and he despises emotional attachments, which puts him in direct conflict with Ricks who still value family or friendship.

It has a tendency towards psychological torture and domination: for example, killing or erasing versions of people, using weapons that affect memory/dimensions, etc.

Intelligence: It's extremely high. In fact, he's practically the most advanced Rick we know: he invented (or advanced) interdimensional travel technology, weapons capable of erasing memories and existence, etc.

His full name: Richard “Rick” Daniel Sanchez (yes, another Rick — obviously) aka Rick Prime.

Ultra-version variant of the Ricks: He is the main antagonist of the series, and the nemesis of Rick C-137.

It comes from the so-called "Prime Dimension" (sometimes also called the Cronenberged dimension) within the show's multiverse.