Hello RSP!
It is always helpful to look for this kind of infomation just surfing the net, study notes are GREAT!
When you have time, read these character descriptions carefully and look closely at how they were written.
If you want to do it yourself, you may begin with his appearance (tall-short-young), then with aspects of personality, (generous-mean), then how these aspects are shown in the story (try to find the examples).
Finally you may give a more elaborated description of the importance of the character's view, opinion, personality related to the story (i.e. psychological analysis, symbolism, etc.)
These are just baby steps, I hope they help.
And these are two sites which may be useful.
The Gold Bug Critical Discussion On Six Legs