Toz thought about what Stitches had told him about Starry Sky Whales. Although the whales' appearances weren't described in detail, they generally seemed to match the beast heading the horde of void beasts. A colossal body with a dark blue underside that gradually fades to a deep shade of midnight blue on the back. Large fins on either side that push the whale forward with incredible momentum.
The closer the massive beast got to the island, the more Toz found it reasonable to call it a Starry Sky Whale. Toz wouldn't have had any reason to doubt it if only the beast's back was dotted with starlight crystals. And nothing Stitches had said explained why the void beasts were chasing it or where the feeling of distress was coming from.
The beast steadily approached the island, and the details that Toz and the others could discern grew clearer. Although they couldn't see the whale's facial expression, they could sense that the void beasts were chasing the whale, not following its lead.