Andersen is incredibly blunt, often pointing out people's flaws. Because of his high rank in observation, he understands their failings quite easily and points them out, but it is not because of malicious intent, merely understanding. He is not so much a bad person, as simply following his Master's directions.
He is not only blunt with everyone, but also with himself. He calls himself a man you could find anywhere, he says that he has no fighting ability and that basically he's useless.