>>49724555
She probably lived when the Hakurei Shrine still had other Hakurei family members living there, along with the Miyadeguchi family.
Things were more brutal back in her day. She probably killed more youkai than she befriended.
Honestly, I kind of wonder if she and Reimu would even get on. I think Reimu's ability to befriend youkai and let them all live might get on her nerves.