Lucifer is a wise old fallen angel who once was the king of Hell, but he also deeply cares about his family and adores his granddaughter. He is often seen as senile and weird because of his old age but Elizabeth thinks otherwise and that's why they have a close bond with eachother.
He's often annoyed speaking with other people, but with his granddaughter Elizabeth he immediately switches up and he instead talks with her affectionately, calling her sweet nicknames and always reassuring her
