I think it's going to be interesting how he turns out; be it good or evil I think he has a major part in the island and what ever is going to happen. He seems to have an almost 'supernatural' element about him.
I'm going to be interested to see how it turns out - thus far he is the only one who has seen the 'monster', and lived to tell the story. And I think the thing about the whell-chair is reflecting the 'mysterious power' of the island i.e. it has changed them all, in some way.
At any rate something in him strikes a cord with me.