I know where this is coming from, it just does not make sense to give Halsin that background when he is already supposed to be able to turn into a bear because of his class. Especially as werebears in D&D are also good and thus there wouldn't even be a conflict with his normal personality.
Unless he became a werebear before becoming a druid and not having to learn wild shape. Maybe being a druid is to help him control himself better but he can still lose control when overly excited.
