She went through shit, directly connected with her family's main source of revenue, and proudly embraced her family duty right after that. One might think that after being kidnapped she would not join an organization that use "hostage situation" as a part of normal routine - but alas. She did.I don't know how you can say that, especially when with Luna. She was kidnapped, tortured and basically mentally destroyed as a young kid. What she does as an adult is directly a result of those events.
I understand why she did what she did. It does not make her any more sympathetic. I saw (in reality) guys, that went though the concentration camps at her age. I had not found many nazi among them.