I am going to guess that 2 is (SPOILER)Tigmafuzz and I am going to guess that 4 is (SPOILER)Shlup and 5 is (SPOILER)Psychotic which means by process of elimination 3 is (SPOILER)me and 1 is (SPOILER)Agent Proto.

So that means:

2 - (SPOILER)Tigmafuzz / Fuzzy T
3 - (SPOILER)Jiro
4 - (SPOILER)Shlup