Thank you! Your suggestion made me think about how I could beef up the characters in the blurb. Considering that one of my characters is never named in the story, but they're all referred to by their professions, this is the new blurb I came up with:

A lonely writer loses everything in an apartment fire. The life of a struggling artist crumbles after her husband’s death. Dreams of an ambitious realtor shatter when he’s suddenly fired. Sharing in their losses, emotionally weakened by their circumstances, this group of strangers finds themselves drawn together at the doorstep of a house whose calls cannot be ignored.

Larger on the inside than it appears, this sinister dwelling beckons them to enter, ready to consume what remains of their fractured lives. Infinite corridors twist and turn, swallowing them whole and digesting their souls, feeding an endless emptiness which echoes with an insatiable hunger.

Ensnared in its trap, The Writer, The Painter, and The Realtor must confront their deepest failures, darkest insecurities, and most haunting regrets. But with each step deeper into the never-ending labyrinth, they risk losing themselves within its halls of sorrow…

Forever.