It just says kill a random unrevealed character so I think so
In the top left shows how many evils have been slain and how many are in match.
If the slain evil number rises when a unrevealed card dies by Lilis, than safe to assume that Lilis has just murdered a evil.
But do remember that Lilis prioritizes in murdering good characters, so the likely chance of seeing it is if there is 1 card left.