A powerful antagonist in the story, who is a witch from a dark world seeking to use her magic for nefarious purposes against Henry and his companions.

Henry’s adventurous cousin, who is enthusiastic and often daring, helping to propel Henry into the mysteries of the cupboards.

Henry’s eccentric uncle, who has a playful and imaginative demeanor, providing guidance and warmth as Henry navigates his new environment.

Henry’s aunt, a calm and wise presence in the household, offering support while keeping the adventurous endeavors grounded.

The youngest of the Willis children, known for her curiosity and tendency to get involved in the activities around the cupboards.

The eldest of the Willis siblings, who is on the cusp of adolescence and participates in family activities occasionally, while also having interests of her own.

The deceased grandfather known for his exploration of the cupboards and leaving behind journals which provide clues for his family.

An elderly man with connections to the cupboard world, residing in Grandfather’s room and searching for ways to aid against threats from other realms.

A boy from an alternate England who befriends Henry and becomes part of the quest involving the cupboards.

A talented baseball player in town, who becomes friends with Henry and aids the family when they face challenges involving the cupboards.

An unusually perceptive cat who seems aware of the cupboard mysteries, providing protection and guidance to Henry and his family.