"She is the girl who is with the long hair."
This appeared in a primary school textbook but I question if this phrasing is indeed grammatically correct. As a native English speaker, it simply "feels off" to me and I cannot find even one example of this structure being used online or otherwise.
I'm no grammarian, so I can't quite express why it feels off other than several items come off as unnecessary or superfluous.
Thanks in advance.