Granddaughter of Death and daughter of his former apprentice Mort. Susan works as a governess and schoolteacher and would strongly prefer that her unusual heritage stay firmly in the past. It keeps not doing so. She has inherited a range of abilities she finds inconvenient: she can walk through walls, be invisible when she chooses, and talk to Death's horse. She is pragmatic, a little cold, very clever, and by the end of the Death sub-series has become one of the most complete characters in Discworld – someone who has genuinely come to terms with what she is.