It's uncanny how similar this person is to the person that I worked with. She would somehow end up with the best jobs that needed the least input and got all the praise for everything she did.
These are highly manipulative people with an uncanny ability to detect ways in to bosses' favours, I hate to say it but they're often super-intelligent/clever/streetwise.
The only way I got through it was to remind myself that nobody said life would be fair and in the end I left the firm, I did find out later that they didn't think she was as special as I thought.
I've seen this a lot in women but not so much in men - women often use their femininity and damsel in distress act-what is this guy using on your boss do you think? Or is your boss a bit stupid?

Achievers defy logic, but it depends, who's logic is the reference point.