Wakaba Himeji

A 5th year elementary school student, and she has the ability to see things that others can't. They are mostly frightening evil spirits, and they tend to do bad things to people who are close to her. As a result, Wakaba has no friends and rarely smiles.

Wakaba eventually befriends an occult-obsessive girl, Reiko.

[Spoiler] She travels to the Oblivion with Yuuki and gets re-born with him.
She founds out she is actually Po-chan's future mother. She founds out she is actually Po-chan's future mother. [/Spoiler]