What do you think of these names for my characters? Do they flow or do they sound to cheesy.

Elizabeth and Lilith. Lilith is already marked by her name (night monster, storm goddess). Elizabeth can be called Ellie when people who love her are talking about her and Elizabeth when those who look up to her are speaking about her. Unless they are cousins or related somehow, I would have Elizabeth Rose and Lilith (something else), like Dark or Storm.