I don't really know, obviously, but I think he'll be a lot nicer than Jeff ever was. I mean, what can you say to that big, open smile on his face?
http://www.nintendo.co.jp/ds/yluj/characters/Also, take note, he is depicted as not smiling some of the time. You may ask, "So what?" To me, that means the chance of his big smile not being sincere is that much smaller. Seriously, characters (or people, for that matter) who smile all the time are almost definitely trouble. Think Kristoph Gavin, who, before GS4 came out, was described by someone on the development team as "always smiling."
Yeah, you just know there's something wrong with him.