Grie'dyr is on the planet Dyznoir, Myst Zone's on Newerth.
And Kim felt the same pronunciation made things interesting - "is it a Valkyrie or an Erinys" interesting.
Ah. Personally it would've been easier to make them connected (or have Grie'dyr: Thunder be Selena's subconcious recreation of Myst Zone). So Kim's leaving that character's backstory open ended? Cool.