The Quintology is the Story of Abe's Journey... along with his friends.
but the important character of the whole story is Abe!
Squeek is the first hero Lorne showed to Sherry, before making Oddworld Inhabitants...
it's only the 3rd hero
oh, and by the way, Stranger 2 is mentionned here:
http://www.xboxaddict.com/news/view.php?News_ID=5412