Alright it's time for an ultra-noob question here, but I don't care.
Anyway, in the midst of the very first mission, Celebro fell down a ravine and won't follow me on my way up. Is he necessary for the first quest or can I just move on? If he is necessary It's not like the game is broken, but I do have to make my character all over again, which is a bit of an inconvenience.