Jared’s identical twin brother, who is orderly but harbors a love for small animals, and provides steadfast support to Jared, particularly during their investigations.

The 13-year-old older sister of Jared and Simon, Mallory is headstrong and skilled in fencing, acting as both a protective and sometimes impatient figure among her siblings.

The mother of Mallory, Simon, and Jared, who tries to maintain stability for her family after a move, unaware of the magical happenings around them.

A small faerie known as a brownie, living secretly within the house’s walls, whose actions play a crucial role in the unfolding mysteries within the mansion.

The previous owner of the mansion who documented his discoveries about faeries in a field guide, providing critical information to the Grace children.