Guardian Spirit Beast

Nen Beasts (念獣, Nen-jū), also known as Guardian Spirit Beast (守護霊獣, Shugo reijū), are Nen guarding creatures possessed by the Kakin King and the Kakin Princes.

History
In the age of rival warlords, Kakin was a small country threatened to be absorbed by it's neighboring countries, around that time the First King of Kakin conjured the seed urn inspired by the "worm toxin" and had his children fight in a succession contest which became the foundation for Kakin becoming the superpower that it is today.

The Seed Urn Ceremony
The ceremony to obtain a Nen beast, the host must offer a drop of their blood and then insert their hand in the center of the Urn, a Fairy Like creature will then come out of the urn holding an egg and inserts it into the host's mouth. He will then be granted a Nen beast.

Properties
Born from a deceased person's strong desire of perpetuation for their descendants, They possess someone related to the dead, feed on their aura and take a shape and an ability influenced by the host, however since Nen Beasts are not a direct creation of their host, they cannot be manipulated at will.

The Nen beasts are imbued with instinctual rules to distinguish them from regular beasts:

1) Nen Beasts do not kill one another.

2) Nen beasts do not attack another human whom a Nen beast is protecting.

Kacho Hui Guo Rou's Nen beast
Kacho's Nen beast is currently unknown.

Fugetsu Hui Guo Rou's Nen beast
Fugetsu's Nen Beast is currently unknown.

Momoze Hui Guo Rou's Nen beast
Shaped like a human size Hamster like creature, it has two eyes stacked on top of one another on it's forehead, two circular ears, a heart shaped symbol on it's belly and a rat tail. It's ability is currently unknown.

Marayam Hui Guo Rou's Nen beast
Shaped like an eastern dragon with six paired horns on it's head, pelvic fins on each lower side of it's body and a pointy caudal fin for a tail. Hanzo and Biscuit note that it's size grows at an abnormal rate. It's ability is currently unknown