1. I think that's a rather complicated question to give a definitive answer to. Firsty, we aren't given a yay or nay to whether Von Glower killed humans. The missing persons reports dating back to the 70s , during the time Von Glower first relocated to Munich, highly suggests he did, in fact, kill humans, though at a much slower fatality rate. As he said; wild animals instinctively kill whatever and consume the applicable amount they need to survive "respectfully". Make of that what you will. Perhaps, if you compare him to, Dexter, from the TV series, a serial killer who only kills "bad guys" maybe we could correlate that with how Von Glower's ideologies function. Though, we also don't know whether these missing people were "bad" to begin with. Again, very tough question to answer. I personally believe Von Glower to have had an evil set of ideologies and a very selfish and one-tracked mind, though born from tragic circumstances beyond his control. He probably believed what he's doing was natural and had had this instinct and these highly-tuned primal tendancies all his life because it's his DNA. On the absolute opposite end of the spectrum is Von Zell who went insane from the lycanthropy and acted like a demon, as opposed to Von Glower, the instinctive, wild animal performing his "natural" habbits. I reccommend reading the novel version of GK2 that elaborates these ramifications somewhat.

2. I think Von Rallick, Von Glower's father, who was cursed by gypsies to turn into a werewolf, was a "black wolf" too. I may be forgetting a bit here. Wasn't that a nickname he, or his family, were given before his lycanthropy by his peers for thier hunintg prowess? I do remember a black wolf family crest. Though, before all that, who knows? It is never revealed in the game or novel. We can assume that there were at least two; Von Rallick and Von Glower, though for argument's sake, Von Glower as the "Black Wolf" was certainly the most notorious - though infinitely more clandestine about it.

3. Most likely, yes. Or maybe new members were introduced gradually until the senior members trusted them completely. No-one likes a whistleblower in the organisation - and probably those black candles suggesting ungodly rituals would put people off too much if used as an ice-breaker.

4. I don't remember. I know what she does with it in the novel version, but I won't spoil it for you.

5. Of course. Madness does that to people - and would furthermore be very effective ammunition for his enemies to use in a coup.

6. Suicide. He drowned himself in the lake. Weren't you paying attention? ;)

7. Hmm, he probably genuinely wanted to join as he no doubt favoured the "philosophy". However, 99.9% of the reason was because he was a tool. Von Aigner and Von Zell needed his cooperation in allowing them to use the zoo wolves as a cover for Von Zell's killing spree. As to him being an "animal lover" - I think he was fascinated, or obsessed, with the instinctive nature of predators. Probably wanted to "feel" what it was like to be a predator and get into the mindset of a natural killer, like the wolf, hunting game.

8. He was forced to. On grounds that he was mentally incapable of remaining in his position.

9. He wanted to force the change in Von Glower so everyone would witness it and thus lead to Von Glower's capture and eventual execution, therefore killing the alpha wolf and effectively breaking the lycanthropy curse, freeing Ludwig's soul. Remember, as a rule, the beta has to willingly participate in the demise of the alpha or their soul would not be freed after they themselves died. FYI, the crystal chandeliers were designed specifically to resonate the precise frequency to emulate a wolf's howl while the strings played a particular note during the final act. They didn't work properly because the modern opera house was reconstructed differntly after WW2 so they couldn't follow Ludwig's precise measurements for the correct accoustics. Gabriel was an initiate werewolf so he didn't have the willpower or discipline to fight the change. It very nearly didn't work on the greatly experienced Von Glower - until after Gabriel turned and let out a geniuine wolf's howl.