James's aristocratic father, a grieving widower and former military man.
Their father-son relationship is strained by James's hidden decision to study drama.
Humphrey is described as James's father, and he initially believes James is training at the Royal Military Academy Sandhurst.
Iris provides Humphrey with emotional guidance and family perspective.
Iris is identified as Humphrey's sister and points out that Hayley resembles Humphrey's deceased wife.
Their hidden family connection reframes their conflict and leads to reconciliation.
The ending reveals that Jack, initially treated as an elderly neighbor, is Humphrey's father.
Their first interactions are shaped by suspicion, deception, and boundary violations.
Humphrey exposes Hayley's false officer-cadet identity, becomes angry when she enters the forbidden study, and is upset by the injured dog.
Explore the full interactive character relationship map of Your Christmas or Mine?