Master Emerald

The Master Emerald wields power over the seven Chaos Emeralds and can manipulate their energies, both neutralizing and enhancing them. With godlike powers and a limitless supply of energy, it can greatly enhance both living beings and robots. For example, in the case of Sonic's Mark II, the Master Emerald enabled a brief transformation into a super form. It also serves as a powerful power source for various machines and combat mechs, including such colossal constructs as the Death Egg. The relic can be used to seal away beings, both divine and mortal, likely resulting in the death of the latter. Its power is so great that it can distort reality: shifting entire islands through time and restoring a planet divided into different regions using Chaos Control. Since the Master Emerald exists simultaneously in all timelines, its disappearance from one would trigger a chain reaction, resulting in its disappearance from all others.
The Master Emerald is sentient and conscious: it can project three-dimensional images, allowing it to communicate with others. When a threat related to the Chaos Emeralds emerges, the Master Emerald can suddenly appear at the most unexpected moment. Only those who maintain close contact with the relic—specifically, members of the Knuckles Clan, such as Tikal and Knuckles himself—can fully utilize its power. To unlock and utilize its abilities, they typically need to recite a Prayer. The Master Emerald can also communicate verbally, engaging in dialogue and monologues.

Kind and caring, he is very grateful to Chaos, Knuckles, and Sonic for protecting him. He is attached to Sonic and is willing to do anything to protect or save him. He was a Junior God but then made a huge mistake that led to the extinction of Ancient Mobius and its inhabitants, and was forcibly turned to stone for it. He also bears a slight grudge against the Elder and Middle Gods for killing his girlfriend as punishment for his misdeeds. He greatly fears and hates Eggman.

Japanese:
マスターエメラルド
Romaji:
Masutā Emerarudo
Other names (translations):
The Great Emerald (official translation)
Basic information
Location:
Altar of the Emerald
State:
In order
Type
The deity turned to stone
Floor
Male

The Master Emerald (Masutā Emerarudo) is an object in the Sonic the Hedgehog series. It is a stone of incredible power and the only force in the universe capable of suppressing the energy of the Chaos Emeralds.[1] The Master Emerald rests on Angel Island, usually located in the Emerald Altar. Its power keeps the island afloat, as without it, the island would fall.[1]
Information
The Master Emerald is a green, diamond-cut gemstone. While typically massive, it can be resized at the will of its keeper, down to the size of a palm.[2] The emerald possesses immense energy, comparable to that of a large Chaos Emerald.[3] It is considered one of the most powerful relics on Earth. In terms of power, the Master Emerald is second only to the Phantom Ruby (Ruby is also a deity that possesses an alt-form of the stone, and the Phantom Ruby is a Middle God, while the Master Emerald is a Lesser God).
In his Mobian form, he's a hedgehog, 34-35 years old, with emerald-colored quills that are disheveled and unkempt, and dark green eyes. His hands (in the video strips), muzzle, and ears are cream-colored. He wears armor crafted entirely from emerald stone.