Emma Johnson is the one who gives words of wisdom, she was on the show 2011-2013. She is one of Lia's younger sisters who appeared on the show (the other being Sammie).
Emma's words of wisdomEdit
A running joke is when Emma said something that was definitely not "obvious" a sign would come up saying "Emma's Words of Wisdom" in capital letters.
This actually happens with other reactors, too, but not as often.