The bond between Anton and Rudolph is fundamentally transgressive. In their world, they are taught to fear or hunt one another. By choosing to be friends, they reject the prejudices of their elders (both the vampire hunters and the vampire clan).

The Monster in the Mirror: Why ‘The Little Vampire’ is a Masterclass in Childhood Loneliness

While most vampire lore focuses on the "curse" of immortality for adults, The Little Vampire explores the tragedy of a child who will never grow up. Rudolph Sackville-Bagg isn't just a monster; he is a boy frozen in time. He possesses the wisdom and cynicism of decades, yet he is trapped in a body that requires him to hide under floorboards.