The clown is only the spectator, he can't interfere in any of it, only with the process of a trial. I doubt it's allowed for them to use inspection skills on newbies so his skills should not have been discovered, yet.
There is no clarity on the utility cards on what they can do ..i mean how did they helped in defeating aquila..or how they will be used in future..u dont expect us to go back when he got them to see their effects right?