Filed under: absolutely ridiculous dreams the Exarch had somewhere early in Shadowbringers. I think he earnestly means to carry her up all those steps and thence up the tower. Not a metaphor for the hubris and guilt he's carrying or anything, probably. Just a sweet pining dream for his warrior of light :)
huge thanks to @count-dadcula who stole Frog's face and this is his settlement of the lawsuit for doing so :P Very fair and reasonable and lovely vampire, honestly.
(I think the Exarch could lift Frog but wouldn't, and G'raha couldn't lift Frog but would try. G'raha lacks the centre of gravity that being made of rock gave him.)