Anna Calvi smiles sweetly. She does that a lot. She doesn't seem like a person who makes monsters. Or, indeed, a kind of music that rages like wild emotions adrift in stormy seas, performed, on stage, with a fierce, laconic poise. There is definitely some split personality going on here. 'When I play live I'm a different person,' Anna smiles, sweetly. 'I feel powerful and fearless. All the things I wish I felt in everyday life.' less