The old woman spirit IS the middle aged man spirit. They just look different from different people's perspectives. Miko's dad sees her as the old lady, and she's been the old lady even when they were kids. But Miko ever since she first saw the ghost has only saw them as the middle aged man
Replied to wrong person oops
Actually no I didnt
Hella confusing but i'll just assume they mean good
Feels like the dad became a spirit partly because of that thing chasing the mom, we can just tell by how he acts around sometime, im still confused about that old woman spirit tho.