So yea, you wouldn't really 'use' a Talent (just read Kaito's post). 

Its fine if she assumes it though, you guys don't know the mechanics of the game, but just looking at something closely or examining it would automatically be a usage of Observation. 

Also, too lazy to post this in the IC (since I'm busy), but Midori finds nothing from examining the four pedestals. Not gonna say whether that is a poor roll at play or that there is nothing of note to be found. 

But yea, she found nothing.