User blog comment:Schmity/Who do you want to see in Season 2 of TWAU?/@comment-108.181.118.78-20150531074238/@comment-38.107.91.134-20150602210244

Not possible, Bigby doesn't have a sister. His two siblings are male, and i won't state more details just in case you haven't read the comic (it is better to find out more by reading the comics and not getting spoiled) Anyway, the two siblings have been stated to be stronger than Bigby and bigger than him, so if Bigby could handle the tweedle brothers just fine, so can the siblings.