a man hagridden by the future, haunted by visions of an imminent heaven or hell upon earth

The only Margaret I know is the one in Dennis the Menace and she's a prickette.

In due course they reached the far side of the Element of Water, gourd annex. The path lead through a translucent vertical wall, and there seemed to be no special challenge to passing through it, except for their fishly status.

Some literature uses a diaeresis over the e to show that it is pronounced: so Bronte, Terpsichore, Hermione, could be written as Brontë, Terpsichorë, Hermionë, but since diaereses take effort to put in there on English keyboards, writers typically leave out the optional, yet helpful, diacritical mark. I think Hermionë is a rather learnèd girl and will decide to use the diaeresis when writing her name; when people ask why, it will give her opportunity to say “So you’ll pronounce my name correctly, ninny.”