In the game Grabbed by the Ghoulies there is a ghostly specter called Gwenyth, she doesn't do much, she just scares the protagonist sometimes when she appears in the mansion.
But points that reinforce a hypothesis that she was going to be a more relevant enemy, in the 2001 trailer of the game, she can be seen looking with a threatening and provocative face, in promotional images, she appears, implying that she would have a more role important and finally, according to one of the game's artists, he has the same last name as the antagonist of the adventure "Von Ghoul".
I don't know if this is enough information to include in the wiki in an article or if it is just a curiosity, because it is not known what it would do in the beta game.