Oh, the mice.
Aeslin mice are highly religious. They want to believe. They need to believe. Their mental health depends on it. So they find something they can believe in, and they believe in it with all their might, for as long as that thing endures. Sometimes it's an object, or a place. Other times, as with the colony that currently lives with the Price family, it's a bloodline. To the Aeslin mice, the women of the Price family are priestesses, and the men? The men are Gods.
The Catechism of the Mice begins with Caroline, the Compassionate Priestess, and continues through the generations to the present day. They have celebrated every birth and mourned every death. They have given their lives in the name of the family. They have given their hearts in the honor of the family. They have given everything they are, and in return, the family has cared for and protected them, and has sworn to continue doing so for as long as family, and colony, endure.
Aeslin mice never forget anything. If they have heard it, or seen it, they recall it. There are divisions within the central family colony, each dedicated to preserving the teachings of their specific Priestesses to future generations. While the colony that lives today will learn the present en masse, in the future, Evelyn, Verity, and Antimony will be remembered by their own branches of the Aeslin priesthood. Nothing is ever forgotten. Nothing is ever left behind.
All Prices are remembered forever, in the rituals of the mice. No one ever leaves for good. As long as there is a family, the colony will endure.