Oh she's mischievous little prankster, that surely won't cause problems. Not at all.
Yuuko is jealous of Okonogi starting to cling to Teiichi, hilarity ensured.
Seems like people knew her, the comb for a long hair must have been placed by someone who knew her and buried, so at least something what was connected to her made Yuuko help to rest in peace. Sort of like we do when body wasn't found, which weren't just like here.
Now, who's that mysterious chair flinging character?
Thanks for scanlation!