Einherjar

The Einherjar are dead warriors who sacrificed themselves for others and live in Valhalla. When Alex Fierro landed in Spanish Inquisition Era Ierland, some of them were freed and became the servents of Ivar the Boneless. Some of the Einherjar came in contact with special coins that mutated them into monsters.

When an einherjar is destroyed, some fall out of it and grow into a giant version of their monster form when touching the coin, some go straight to giant after being destroyed.

Feather Weight
Feather Weight was an einherji that became possessed by a mysterious coin. He could use his wings to make a shield and had a viking sword with him.

He is based off Legion Soldier NeoJet from Day 2 of Oh Sentai Kagaranger

Barracuda
Barracuda is a fish themed monster. It was able to use water to its advantage when the knights first came upon it.

He is based off Dead Fish Legion Knight from Day 7 of Oh Sentai Kagaranger.

Peeler the Goat
Peeler the Goat is a mutated goat monster. He keeps his mortal name of Peeler, which makes him the first monster with a real name instead of one completely based off his characteristics. He can use his head as a battering ram and spit acid.

He is based off Legion Mutant from Day 4 of Oh Sentai Kagaranger.

Tiber the Shark
Tiber the Shark is a shark themed monster voiced by Campbell Cooley. He keeps his sentai name to an extent. He has a strong bite and advanced aquatic skills. He also had the ability to control Longboat robots.

He is based of China Sea Legion Tiber from Day 8 of Oh Sentai Kagaranger.

Tooma
Tooma was an elvish Einherji turned Crab monster in Rotterdam to help find Ivar treasures. His claws were his main attack function.

He is based off Neglected Ocean Beast Crab from Day 9 of Oh Sentai Kagranger. He also shares his name with Lupin Blue from Lupinranger vs Patranger.

Long Neck
Long Neck is an ostrich and second female member of The Northman (Chloe Fernado was first). She accidentally took a coin when no one was looking and went after a rustling noise near the camp and was defeated by Tobit Cromwell before going Jouthan and defeated by the Mystic Knights Megazord.

She is based of Savannah Legion Osris from Day 12 of Oh Sentai Kagaranger.

Red-Eye Frog
Red-Eye Frog was a late night creation of Ivar and an Einherji, thus getting the Red-eye tag. It has an extremely long tongue that can put anyone immediately to sleep. He is defeated by Tobit Cromwell. First with Daggeron, then as Green Knight Megazord.

He is based off Sleep Scientist Coqui from the 15th episode of Oh Sentai Kagranger.