>Futo and Tojiko were originally mutual enemies from the struggle over Buddhism.
>As for why Futo would do such a thing, it is likely because of the grudge she held after the struggle that led to the downfall of her family in the past.
Yeah buddy, Tojiko at this time is not a child. She was an important member of her clan. Sure, Futo betrayed her clan, but that doesn't mean she didn't feel hurt when her entire family were murdered by Tojiko's clan. It's no strange that Futo hold a grudge against Tojiko after all of that.