It has deep ledges between pieces of its shell. From afar, it looks like it has sharp peak mountains, which is not what one would expect from an island in a world with highstorms. The peaks probably grow continuously as part of the shell of the 'god'.
(Its shape probably resembles that of a lobster, with a head and a neck unlike a crab, and although readers are not told explicitly, it probably has claws being that the islands can fight each other.)
Its eyes are as big as a house, and of full black with no white.
Rysn believes that Relu-na is impressive, but that the Reshi people cannot make everything they need for themselves. Given the argument that then ensues between Rysn, Talik, Talik's father, and Talik's mother, Rysn invokes that Relu-na appreciates boldness and then decides to speak with the one being who has more authority than the heir apparent, and the King and Queen of the Reshi Isles: Relu-na itself. She grabs a length of rope and slides down to somewhere above the god's eye, then speaks to him:
|“||"O great Relu-na ... your people refuse to trade with me, and so I come to you to beg. Your people need what I have brought, but I need a trade even more. I cannot afford to return." ||”|
Relu-na did not reply while Rysn hung in place beside its shell. Talik stated that the King had commanded that she return and she asked of Relu-na just what it thought:
"And what do you think?" she asked softly.
Down below, the thing bit down, and the rope suddenly became very tight, slapping Rysn against the side of the enormous head. 
The rope snaps and Rysn falls ... but she sees the god's eye, a glimpse as she passes, large as a house, glassy and black, reflecting her falling form.