Onibaba is a Category II Kaiju.

Biology
Bearing a striking resemblance to a crustacean and a Japanese temple, Onibaba appears somewhat smaller than the rest of the Kaiju in height, but larger in terms of width.

This Kaiju possesses four large legs, along with two thick claws. Onibaba's claws are said to able to crush over 50,000 pounds per square inch. Two small, arm-like appendages reside in the Kaiju's thorax.

Onibaba also possesses a high crest above a large, symmetrical head that can withstand close range and energy based attacks. Onibaba is not openly hostile; despite the damage it caused the general area of Tokyo, it actively avoids combat with an enemy unless provoked. Even then, its attacks are primarily defensive and not offensive.

History
Onibaba's attack on the Japanese capital city of Tokyo was dubbed the "Onibaba Incident". The beast lays waste to the city, killing millions of people. In the midst of destroying the city, it notices a terrified little girl wandering the streets crying for her parents: Mako Mori. The Kaiju relentlessly chases and corners her, but is interrupted by the arrival of Coyote Tango. Piloted by Stacker Pentecost and Tamsin Sevier, the Jaeger is deployed to the city to aid the military in luring Onibaba into a more isolated area in order to prevent further casualties.

During the battle, Onibaba is able to inflict damage to Coyote Tango's head. Tamsin Sevier blacks out from a seizure, forcing Stacker Pentecost to undertake the dangerous task of piloting the Jaeger alone. He succeeds in doing so and kills Onibaba, saving Mori.

Trivia
"Onibaba" means "demon hag" or "Ogre Grandma" in Japanese.

Kaiju Specifications
Height:  188 ft (57.3m)
Weight:  2,040 tons

​Gomora (ゴモラ Gomora) is an ancient kaiju species from Earth. They are immensely powerful, being the first kaiju able fight an ultra to a draw. While Gomora is supposedly portrayed as a hostile Kaiju, starting with the emergence of Rei's Gomora, most later incarnations of him are portrayed as comrades to respective protagonists of the series.

History
Ultraman
Discovery And Capture
Professor Nakatani, aided by SSSP member Arashi (acting as his guard), goes on a scientific expedition to the Johnson Islands. They discover that the legendary kaiju Gomora is still alive, and Nakatani decides to bring the still-living kaiju to a museum for the World's Fair. The SSSP agrees to do this task, despite the utter illogic and danger of bringing a living kaiju to a largely populated city. Before the kaiju attacks them, Arashi tranquilizes the kaiju with the UNG Dart, and the Patrol airlifts the kaiju via nets with the Jet VTOL. However, the kaiju awakes an hour early due to atmospheric changes between the island and the mainland and struggles to the point where the VTOL's have to release the nets, thus causing the kaiju to fall two kilometers to the ground. The Prince of Monsters: Part 1

Escape From Ultraman
Enraged, Gomora goes on a rampage on Mount Rokkô (where he landed), and Ultraman, who comes to the rescue, is unable to stop the kaiju, and is beaten, much to everyone's shock. Even worse, somehow in the fight, the Beta Capsule is knocked free from wherever its stored in Ultraman and its retrieved by a kid nicknamed the Monster Prince due to his fascination with kaiju.The Prince of Monsters: Part 1

Rematch And Defeat
When Gomora continues his rampage, Hayata of the SSSP uses the powerful Mars 133 gun, invented by Ito (Ide) to counter the second appearance of the Baltans, and succeeds in severing his tail. But the kaiju burrows under the ground in retreat, and later appears at Osaka Castle. The Patrol is ordered to save the castle at any cost, however Gomora smashes the castle. As the kaiju pursues Ide and Arashi, the child returns the Beta Capsule to Hayata. Hayata tells the kid to run and hide then uses the Beta Capsule to transform back into Ultraman. Ultraman saves the day by breaking the Kaiju's nasal horn and left crest and blasting him in the forehead with the Specium Ray. Hayata rewards the Monster Prince by giving him his communicator-insignia and tells him to study hard and not obsess over kaiju.

​Trivia
Gomora was the first kaiju to defeat Ultraman (until their second battle which Ultraman won.)
Gomora is also the second kaiju Ultraman had to fight twice, the first being Red King who Ultraman had fought just an episode prier.
Gomora's roar is a combination of Gaira's roar (from War of the Gargantuas) and an elephant trumpet.
Gomora's suit would later be modified to create the kaiju, Zaragas.
Originally, Gomora and Red King were to be revived by Geronimon , but due to their suits being in overused condition, were replaced by Telesdon and Dorako. This fact is left in the English dub when the SSSP mistook the revived kaiju for Red King and Gomora.
Gomora's original design was to have a second head crest pointing down. This design was used instead for Gomora Ⅱ in Ultraman 80.
Gomora's designs would eventually inspires Greymon, a Digimon from the Digimon franchise, with the reference can be seen on his durable cranial skin, mimicking said Kaiju's horn.
In episode 25 of Ultraman Taro, Gomora was seen in a animated flashback as part of the Monster Army lead by Alien Empera.

Data
The original Gomora was a simple land kaiju and lacked most of the powers that other kaiju kept. When a Gomora was made of minus energy, it gained a majority of powers, and a Battle Nizer Gomora, as all Battle Nizer kaiju do, gains a variety of energy based attacks.

The original Gomora lacks any supernatural powers but has extraordinary strength that can rival even an Ultra. A Battle Nizer Gomora seems to be much stronger than a natural one, and is able to use energy attacks.

Stats
Height: 40 m, 58 m (Max/Mebius)
Weight: 20,000 t, 64,000 t (Max/Mebius)
Burrowing speed: Mach 2 (Max)
Origin: Johnson Island, Fridnya (Max)

Powers and Weapons
Overall
Burrowing: Gomora can burrow at fast speeds. This is because they used Super Oscillatory Wave to burrow underground.
Mega-Ton Tail: Gomora's tail is often used in combat, even when severed it can briefly live on and attack. This tail is able to lift his whole body, as seen in Mega Monster Battle: Ultra Galaxy Legends The Movie.
Ultra Galaxy
Super Oscillatory Wave (超振動波 Chō Shindō-ha): The Battle Nizer Gomora can fire a wave of energy from his nasal horn. Gomora can also impale his foe first, then fire an oscillatory wave that surges through his opponent's body. Can destroy a monster in one hit. This wave is supposedly what its species used to burrow but one known Battle Nizer Gomora managed to channel this as a weapon of defense. However in later media, other Gomoras (which all of them came from Spark Dolls) exhibited this ability through unexplained means.
Monster Busters Powered
Fireballs: Gomora can shoot pink fireballs from it's horn.