The Trinity of Realities is a term used in the Bayonetta series to describe the universe of the games.The Trinity itself is composed of three realms housing the traits of Light, Darkness and Chaos.
It is said in the games that the Trinity of Realities did not always exist in the universe and is the result of an ancient event called "The first Armageddon" which split the "old" world into three realms.
Role in the games
The control over the Trinity of realities is a major theme in the games of the series:
Paradiso is known as the highest layer of the Trinity of Realities and is the home to the light affiliated Angels. This realm consists of architecture similar to those of the Human World along with a constant mystical glow and many angels' feathers floating in the air. This realm is ruled by Jubileus, The Creator, and is the realm that the Lumen Sages were the closest to.
Plane where the Chaos affiliated Humans live. This realm was ruled over by Aesir, The God of Chaos, before he split his power into the Eyes of the World thus granting free will to the Humans. Most of the Human World is unaware of the true nature of the World save for the Umbra Witches and the Lumen Sages who were made aware of their universe's true nature in order to oversee its history.
Inferno is the realm of Darkness ruled over by the ruthless Queen Sheba. It is the harsh home of the Demons and is a world where only the strongest survive. It is the realm closest to the Umbra Witches and the place where their souls end up after their death.
Purgatorio is a "parallel reality" located in the center of the Trinity. It is a world where Angel, Demons and magically linked humans can travel to conduct their affairs without interfering with the others realms.