Werewolves are most commonly CE, as written, but it's not an essential trait, and individuals can choose otherwise. This is especially true in the case of adventurers themselves, who are by general definition unusual. Astarion, for example, is not evil *because* he's a vampire spawn - he's evil because of who he is and how he behaves. Helia may be a werewolf, but she's also an adventurer and her own unique person, so we won't know how she aligns until we meet her; it's quite conceivable that she deliberately defies the way her curse inclines her, if she's slated to be in with our good companions.
And I like that without statically assigned alignment (e.g. you're a werewolf or a vampire spawn, so you have to be CE), there is more room for character development. It would at least be possible
