Mwana Wamwari live in the rainbow forests in a small community of homes dug into the bases of trees, homes made from root and earth, so as to be closer to Babban Mai Tsaro, from whose blood they spran during the last War of the Gods. As she fought against Dhat-Gnthazhu, the Devouring Worm, and drove it into deep space, it slashed her chest and spilled her blood on the ground far below. From it sprang the Mwana Wamwari, who swore to protect the world she protected. Their whole culture revolves around seeing to it that Shem is protected from the Eldritch and their servants. To do this, they have created a special tree known to them as the Ambuya, the Grandmother, in whose roots is the lifeblood of the world. She is a younger sister to the World Tree, and should the elder die, she will be her replacement.

Because Mwana Wamwari do not age and always appear to be children, they do not have a common coming of age tradition or any practices of growing up. Instead, new Mwana Wamwari are taken under the wing of another and taught what they need to know. This involves learning to craft their own home, how to cook and clean, how to plant fruit trees and vegetable gardens under the canopy, how to work with animals, how to read and write, how to do basic mathematics, science, and technical skills, and how to use certain esoteric powers and energies. Every member of the nation learns all of these things and more in order to contribute. There is no social structure, no hierarchy. All community decisions are made collectively, though usually, no decision is needed. They simply know what to do.

Every night, the whole community eats together. Everyone brings food, and they all share. If someone has been too busy to make something, others know and make up for it. The community makes sure everyone gets fed. Guests are given first choice of what to eat, then those who are too ill, weakened, or otherwise unable to feed themselves or even just make a plate get to eat, and then it goes by age, with the oldest and youngest going first, onward to those in the middle. This principle of fairness and its application guides them in almost every aspect of their daily lives. It tells them what to prioritize and when. Other daily communal activities include fruit-picking, exercises, bathing in the pools and river, washing up, and feeding the animals. Everyone takes part of the best of their ability.

Every year, the community comes together during the summer solstice, just before sunset, to go to the Ambuya. There, each one puts a small trinket that they have crafted during the year into the small hole in the trunk near the base. There, the trinket is pulled into the world's lifeblood and feeds the tree, bonding the community to it and to one another. This ceremony is called nguva yekubatana, and it is the most important part of their year.