** spoiler alert ** 
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 The Darling was always abusive - love me or else I'll slap you or harm you to make you love me. (Seriously?) Ever since book two but it becomes obvious here. Every time Alina rejects him, he gets mad. 
 Mal was boring enough I guess. I wouldn't have cared less if he stayed dead. He was ok, but not as a love interest. (But you can't really ever leave YA main characters single, can you?) 
 The prince was actually interesting (but not in in the love interest type of way). His words always made me smile. But the annoying parts were where he came up with inventions that mirror reality. Elevators, hot air balloons, etc. (Can't you invent something original for once??) 
 Everyone else was ok, like Mal, I guess. Like I said, I didn't feel much of anything. 
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