Other supernatural beings, such as werewolves, shapeshifters, etc., exist but do not go public until later in the series.
Two player characters can transform into werewolves, which massively increases their speed and attack.
As a result, werewolves seem to be unaging, as a new perfect body (healed of injuries) is created for it at moonrise and moonset.
Animagi have full control over their transformations and retain their minds, whereas werewolves' transformations are involuntary and include severe changes in personality.
The transformation of these werewolves are also tied to moonlight.
This is where the "other" kinds of werewolves come from.
The symbol for werewolves is a black foxglove.
Also, it is revealed that werewolves lose their powers under a lunar eclipse.