Can someone identify this girl in Nurarihyon no Mago?

Question

I left the title ambiguous as my question is slightly spoiler-ish.

Who is this girl who killed Nura Rikuo's father, Nura Rihan?

Did they actually say who she was? Or am I right that they never flat out said it?

Hagoromo Gitsune was still sealed, so it couldn't have been her. But I know it has something to do with Hagoromo Gitsune's curse.

Answer 1

She is...

young Yamabuki Otome (Hagoromo Gitsune's host).

who is actually...

Rihan first wife. Abe no Seimei and Sanmoto Gorōzaemon brought her back to life in her younger form to become Hagoromo Gitsune's host.