For what it is worth - the character is bugnuts! Her dad created the neo-Nazi group as a built in audience for his weapons, and as a tool against the Brotherhood of Steel. (He actually has an excellent reason to hate the BoS.) He also rents them out to the Enclave as thugs. Evil but competent. Their standard weapon is a .45 PCC with underslung 3 round shotgun, more reliable than most postwar weapons.
His daughter, on the other hand, is a true believer. That cancer that is killing her dad? It is being helped along by a steady dose of poison.... She also has some pre-war movies in her collection, about a character named Ilsa.... (Really bad 1970s Nazisploitation. Really, really bad - it has become a cult film over the decades. The sets were left over from Hogan's Heroes....)
Under her command the Kreigers will self destruct, bringing down a lot of people with them. I plan to portray her as over the top - bad fake German accent, bad pseudo-German. A swagger stick, custom machine pistol, etc.. Killing her might actually give the Kreiger organization a longer lifespan....
The Auld Grump