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I perfectly understand why you're trying to portray Liza as a witch (although the Mafia members during the execution curse and condemn the peaceful players; look at Azi's execution, look at the executions of the Mafia in "The Tavern," etc.):
Yesterday, there were 3 candidates for execution: Slonysh, Liz, and Zedzi.
Who was the most active in advocating for the execution? Imaris. Let's think about what the reasons for this could be.
Zedzi and Slonysh are suspected by the captain (who has a double vote, after all).
What does Imaris do? He organizes the execution of Lizard, as everyone is hesitant about who to execute.
After Liza's execution, he eliminates one of the two suspects – Zedzi. He chooses Zedzi specifically because it's easier to kill Slonysh during the day, as the captain is eager to execute Slonysh.
Indeed, it would be foolish to kill the captain's main "unfavorite" at night; he can be easily eliminated during the day.