a.) Goofy Silver Age attracts-all-weird-things alien detective.
b.) Hard-working, wistful, filled-with-awe Silver Age detective.
c.) Sardonic father figure to a clutch of juvenile superheroes.
d.) Uncorruptible noir detective with a limited powerset and vague, yet haunting, past.
e.) Naive do-gooder making the most of the hand he was dealt.
f.) Ticking time bomb waiting to unleash the fury of an ancient planet.
g.) Outsider distancing himself from humanity and embracing his alien side.
h.) Peaceful, stoic warrior, with no outside pursuits and who lives only to serve the League.
i.) Friend and protector of all squirrels everywhere.
(You know you want to pick this one!)