Ramsey is the primary antagonist, initially involved in Devon's schemes but ultimately forging a path marked by leadership and resilience, influenced by his literature tools and past adversities.

Hester, Devon's dynamic counterpart, presents a more overt femininity and becomes a critical ally, revealing hidden depth and strong moral convictions shaped by her unique background.

Cai, Devon's son, is an extraordinary child with mature traits and a complex understanding derived from his interactions with various adults, seeking acceptance and belonging.

Mani serves as a human lens into the book-eater world, his experiences with Devon offering insights into their culture and the personal sacrifices he endures in pursuit of understanding.

Jarrow is a significant and supportive figure in Devon's life, providing friendship without romantic involvement and helping her navigate the intricacies of the book-eater society.