Bellatrix wanted to be a dark witch, and she got what she wanted. Andromeda was a dark witch from the beginning and spent her entire life trying to undo it. (Character sketch of Andromeda Tonks as she appears in Shards of Nuance.) 15 chapters.

The Second Wizarding War and the final Death Eater trials raise questions and concerns for Hermione that it doesn't answer. Her disillusionment is only addressed when Bellatrix Lestrange, and therefore all tthree of the Black sisters, turn up unannounced in her life a few years later. Bellamione.