Raijin, Hakuja and Shrikethorn

Raijin, Hakuja and Shrikethorn are the major antagonists of the 2018 blockbuster ''Pacific Rim: Uprising. ''They are three Kaiju that attacked the city of MegaTokyo and later become the Mega-Kaiju created by Newton Geiszler.

Biography
While the PPDC were able to stop the Kaiju hybrid drones, the creation of multiple breaches allowed three Kaiju into the city of MegaTokyo: Shrikethron, Hakuja and Raijin. The surviving Jaegers, Saber Athena, Bracer Phoenix, Guardian Bravo and Gipsy Avenger enter the city to confront and kill the Kaiju.

The ensuing battle motivated Newton Geiszler, who remained under the influence of the Precursors, to send out the smaller hybrid drones that forced the three Kaiju to combine to form a "Mega-Kaiju". The combined Kaiju was able to overpower the Jaegers, save Gipsy Avenger, and began to complete the mission of the other Kaiju before it: reach Mount Fuji and trigger an extinction level event using the Ring of Fire with their blood.

Upon learning the Kaiju's plan to kill itself on Mount Fuji, the PPDC used its surviving Jaeger, Gipsy Avenger, and fashioned a rocket to one of its hands. With the help of the Rogue Jaeger, Scrapper, Gipsy Avenger is able to launch a kamikaze attack on the Mega-Kaiju by flying into the atmosphere and then sending the Jaeger on a collision course with the Kaiju. The Mega-Kaiju is killed by the attack moments before it can complete its mission. With the destruction of the Mega-Kaiju, the consequences of the Kaiju's resurgence spurred the PPDC to plan an invasion of the Anteverse, implying that they had created the necessary formula to make their own Breaches from Newton's works.

Personality
Raijin is a Kaiju likened to a Tyrannosaurus rex in either appearance or temperance. Raijin is designed with an "inner" and "outer" head, shaped like a Venus flytrap. Its "inner head" is protected by the "outer head", hard shield-like plates around its skull. The plates also serve as a plasmic jaw, which can close to defend itself, and absorb kinetic energy from weapons used by the Jaegers. The phosphorescent glow of its blood is visible in the veins on the surface of its face. Its veins glow when it absorbs kinetic energy from attacks. Raijin can use the absorbed energy to empower itself or redirect it toward an opponent.

Hakuja is another Kaiju that has a Crustacean-like armor, with a body-style similar to that of a crocodile. Similar to a mole, it is capable of burrowing several feet underground, using its armored head to break through the ground and to ambush an opponent. Hakuja's muscles are strengthened by its molten blood, and its armor-plated spiked tail can pierce the armor of a Jaeger.

Shrikethorn is another Kaiju whose skin is grey and barbed. At the front of its head, shaped like a hammerhead shark, are multiple blue eyes. Other than its ability to produce plasma that it can use as an offensive weapon, Shrikethorn carries sharp, bioluminescent spines on both of its tails, which can be launched, becoming dangerous projectiles.

Trivia

 * Raijin is the name of the Shinto god of thunder in Japanesemyth, and the companion of the thunder beast Raiju.
 * Visual Effects Supervisor Peter Chang describes Raijin's stance as "Devil-like".
 * According to Stefan DeChant, Raijin's energy absorption was inspired by Tesla, Inc..
 * The base sound effect used for Raijin's roar was a goose.
 * The name "Shrikethorn" is a combination of name Shrike and the thorns of a Rose bush.
 * Unlike Hakuja and Raijin, Shrikethorn can run all fours or its hind legs.
 * "Hakuja" means "white snake" in Japanese.
 * One of Hakuja's early names was "Hibagon" which is the name of Bigfoot or Yeti like cryptid reported from Hiroshima prefecture, Japan in 1970s.