Characters in Lullaby

Spenser

A private investigator and former boxer in Boston's Irish-American neighborhood, and the series' recurring lead.

Also in The Godwulf Manuscript, God Save the Child, Promised Land, The Judas Goat, Looking for Rachel Wallace, Early autumn, A Savage Place, Ceremony, Valediction, A Catskill Eagle

Mattie Sullivan

A fourteen-year-old girl who hires Spenser to investigate her mother's murder four years earlier.

Hawk

Spenser's longtime friend and partner, a former boxer and current private investigator.

Also in Promised Land, The Judas Goat, Ceremony, A Catskill Eagle, Taming a Sea-Horse, Pale Kings and Princes, Crimson joy, Double Deuce, Chance, Small vices

Vinnie Morris

A former mob associate and Spenser's friend, who helps him investigate the case.

Also in Old Black Magic