Saeki-chan the bamboo spirits really meant no harm to humans, she just having the intentions to only protect the forest from harm either by humans & evil youkai.
Norikabe's willingness to protect her & the forest eventually unable to resist the youkai-looking fox from causing her death.
However, there is a glimpse of hope as new offspring of the bamboo plant managed to grow despite the destruction that took place!
Norikabe might have the chance to meet Saeki-chan soon 😍💖