Jay

In "Island of Dreams", "Jay" is introduced as an opiate-like wessen drug often used for recreational purposes. The drug is highly addictive, and seems to elevate mood and induce drowsiness in wessen. However, the drug has no effect on humans and is thus not illegal.

The drug can be aquired through dealers or through private clubs that resemble opium dens. Jay addicts will go to great lengths to acquire Jay, as evidenced by the murder of Freddy for his supply.

Rosalee reveals in "Island of Dreams" that she was a Jay addict for seven years before she cleaned up and moved to Seattle.