:Are you an important player for the town? Do you use Night Defense at night? Are you not Mafia?
We'll find out what her role is - first.
Secondly, at least 4 Mafia members executed her. We'll find out the role - we'll consider the blocks, and check the rest.
Lizard, in essence, admitted that he is one of the blocked roles (if he's telling the truth) or Mafia (if he's lying), and he couldn't be a role with a non-displayed Night Defense.