This story is probably from the time on which people still recalled that one of the scum/shithead aspects of the Marisas was sadismn toward fellow yu's and "lesser beings".
Now a days nobody mentiones it even though one could say the sadismn is still present, just in different ways.
And then one after another, the Marisas also ceased to be.
When the yukkuris had disappeared from that place, all that remained were their accessories.