Cuttlefish That Loves Diving
The plot thickens :p. I choose to believe Aurora is a transmigrator being pen-pals with other transmigrators, but that leaves questions about Lumian, since he's having dreams of the grey fog. I like that the siblings of CoI are two people well-aware of mysticism. It's a huge difference from LOTM but in a way that's still accessible to new readers, I think. Poor Lumian not having a straightforward path like Klein did to becoming a Beyonder, man's gotta hunt down stories.