Captain Merrick was a Varrock guard who guarded King Botolph's Tower with his men. After meeting Pia, he joined Larkin and Devlin to aid Papelford, who had tripped in the darkness, but was attacked by undead. Merrick survived and dragged Devlin's body up the stairs, but was bitten by the undead man. Dying, he ordered Pia to get Gideon Gleeman and passed command to Grimm before becoming a zombie himself.
Merrick had a wife and a daughter.