Human

A Human is a living being who appears in Bleach. Most characters who live in the Human World are Humans. The majority of Humans are completely unaware of the dangers they are exposed to from Hollows and other evil spirits. Only a very small percentage develop a way to sense Reiryoku and are known as "High-Spec". These High-Spec Humans are sometimes able to see and interact with spirits, Shinigami, and Hollows.

Overview
A Human's body, like everything that originates in the Human World, is constructed out of Kishi; and like everything else in the world, contains a Soul. Unfortunately, a run of the mill Human Soul can be removed from its body with relative ease, but also restored just as easily, so long as the Chain of Fate wasn't broken.

High-Spec Humans
A High-Spec Human is a Human whose Reiryoku is large enough to be able to sense the presence of Reishi made objects, such as Souls, to varying degrees and for various reasons. Humans with large enough Reiryoku would be able to see and physically interact with Souls of all types. In even rarer cases High-Spec Humans will develop powers, either spontaneously or due to an intervention, which will allow them not only to interact with Souls but also to defend themselves and others against dangers posed by Hollows and other parasitic spirits.
 * Karin Kurosaki
 * Yuzu Kurosaki
 * Tatsuki Arisawa
 * Keigo Asano
 * Kyōko Haida
 * Ichigo Kurosaki (formerly)
 * Orihime Inoue
 * Jinta Hanakari
 * Ururu Tsumugiya
 * Don Kanonji

Quincy
The Quincy are a group of Humans who learned how to manipulate Reishi and use it as a weapon for hunting Hollows. Due to a conflict with Soul Society and the Shinigami, the Quincy are all but extinct.
 * Uryū Ishida
 * Ryūken Ishida
 * Sōken Ishida

Fullbring
Fullbring is a capability that appears in Humans whose mothers were at some point attacked by Hollows. The attack left traces in the bodies of the mothers that were later absorbed by the children while still in the womb. It enables its users to draw on the Souls within objects to make them do the user's bidding.
 * Kūgo Ginjō
 * Yasutora Sado
 * Giriko Kutsuzawa
 * Riruka Dokugamine