Ridden

From the White Wolf Wiki, the most complete White Wolf reference

Spirits need physical bodies so they possess humans without a second thought, some, if they need to hide, will also possess animals. Those possessed become Ridden.

There are two types of possession, being Urged or being Claimed

• Spirit-Urged - A spirit nudges the host's desires and impulses like a backseat driver.
• Spirit-Claimed - victims of outright possession and control. The spirit directs every movement of its vessel, and its more direct control can affect its host’s very flesh.