Do werewolf characters have any powers in game that might give us any hints? What are they?
DaggerfallAdvantagesAttributes
+40 on Strength, Speed, Agility and Endurance, but no score will go above 100.
+30 on Hand-to-hand, Climbing, Running, Stealth, Swimming and Critical Strike. These advantages are for human form as well as wereform. The 30% boost does not count toward level gains, you can increase it to over 100% even if you weren't at 71 or above when you were infected.
Spells
Access to the ability Lycanthropy can be used once a day for no cost, changing the character into their wereform.
DisadvantagesThe need to hunt innocents twice a month. This means you have to kill a peasant, or a guard. If you do not do this, your hit points will damage very rapidly, leaving you with four max hit points.
Morrowind Your only weapons when in werewolf form are your claws (they are hand-to-hand, but they damage health instead of fatigue); you also can't use magic. Agility, Endurance, Speed, Strength, Acrobatics, Athletics, Hand-to-hand and Unarmored will all increase, everything else will be set to zero or be lowered by 10 or more points. Werewolves can thus leap far and run very fast.
Doesn't seem to help much.