Queen Grannicus is a character from Loonatics Unleashed.
She is a royal villainous descendant of Granny, who actually protected Tweety from Sylvester. She didn't want The Royal Tweetums to claim the throne and allied with Sylth Vester to prevent that. To prevent suspicion, she used her scepter to disguise her voice while talking to Sylth Vester. Both were defeated. She is also similar to Darth Sidious.