Toho Kingdom

Abbadon is The female M.U.T.O seen at the end of KOTM. Named because she too comes from a pit, her natural antagonism with Godzilla's species, and Abbadon's "swarm of locusts"/her offspring if she ever finds another male to breed.

Leviathan (Named Nessie by local Monarch staff for obvious reasons) is a ancient stem fish, that looks like a cross between a Dunkelosteus and a lungfish. She's actually been in a state of semi dormancy for millenia and only awoke with Ghidorah. The "sightings" are just tourist traps building on the myths, funded clandestinely by Monarch for years to make any leaks about her existence seem less believable and avoid a mass panic.

Amhuluk is a rare herbivorous Titan like Behemoth, he is a giant elk with aquatic adaptations and startling bioluminescence.

Baphomet is a baffling Titan. Resembling a flower mantis (plant-animal hybrid, so quite literal) with hardened rock armor after years of hibernation, it has the ability to spread a pollen which subtly influences organisms in the area. This can range from calming draughts to causing full on berserk riots. More frightening, Baphoment seems to have a cruel intelligence, and seems to be interested in the influence of it's pollen on other species.

Sekhmet is named after and looks similar to a cat, but is actually a giant gorgonopsid. She has evolved her fur into quills like porcupines to attack foes and has a Varan like wing membrane. So basically, cat version of Rampage's Ralph.

Yamata No Orochi is not a singular Titan, but rather a family of massive snake/plesiosaur hybrids. Orochi himself is usually given to the largest alpha. Living in magma, they quickly left to unknown areas after Ghidorah was dethroned.

Typhon is not an animal Titan but a massive slime mold. Leaking from within the Hollow Earth, it infects animals and mutates them into massive violent forms, making it the father of monsters like it's namesake. When Ghidorah "awoke it", it rushed out and gained a semi physical form by enveloping the skeleton of an elephant herd. It was the only Titan killed during the crisis, but it's remains ended up being spread all over the local forests...….

Bunyip is a seal like Thylaceo.

Tiamat is a massive salamander who exudes a slime that salts the Earth as it moves. Normally, it increases the nutrients it needs in it's underground lake home, but it can also poison the Earth due to it's potency.

Quetzelcoatal looks like Quetzelcoatal.