1. Franky: Gets tossed into the sea by his parents, his extiction was denied by the world, Iceburg hates him, people in the street hates him also, olny people he talks to was Tom and Koroko, he was framed, got runned over by the sea train, blames himself for Tom's death, builds himself with metal parts, Iceburg gives him the blueprint and was asked to leave town but refuse, saw his "family" beaten up by the Straw Hat pirates, vows and searched for Luffy, when he found him he tries to kick Luffy in the ass but there was crowds of shipwights after him. Ouch, he's been through a lot.
2. Nami: Birthplace attacked by pirates, infect Nami was survived by 2 years old Nojiko, they were discovered by Bellemare and atopted them, when Nami was 10, Arlong attacked the villiage and Nami was forced to watch Bellemare get shot in the head, force to work with Arlong under fear, anger, stuffering, hatered and pain, she tries to free her villiage by robbing pirates to collect 500 million berri, she thougth the village hated her, she olny talks with Nojiko not knowing she told the village Nami's plans, shocked when the marines shows up and took her money, shocked that Gen and the villiagers knew her plans the whole time, Nami realize Arlong ripped her off big time and tries to keep her people from declaring war with Arlong, fails and stabbed her arms, she would had died rigth there if Luffy was not around. Damn fucking touching sad "really cries"
3. Nico Robin: Got a bounty on her head at eight for sinking 10 ship by accident, witness O'hara incident, get chased by Government for 20 years, very loney and seen by the world as a cold-hearted devil lady theofore she is a exterme outcast, tries to joint groups hoping to make friends olny to have the Buster Call blowing them out with her own eyes, joins the Baroque Works and became a sneaky lady always taunting Vivi, later gets threated to death by Crocodile and nearly died in the collaped tample, joins the Straw Hat Pirate hoping to seek friendship from them olny untie later she meets Aokiji who stalks her and gave her a fatal terms to follow, force to abodned her friends and work with the cruel Government. Really sad.
4. Tony Tony Chopper: Has a blue nose, Stunned from his group, ate a devil friut, becomes a human raindeer, get chase by people with guns thus ended up hating humans, gets beaten up by his own group, meet Hiruluk and became his olny friend, found out later that Hiruluk ate a poision mushroom ran after him olny to watch him blow himself up and a king laughing his ass off, lives with Dr. Kureha for 6 years hating humans, Wapol shows up again struggling to defend the castle from Wapol and would had died if Luffy was not there helping out kicking Wapol's ass. Very sad.
5. Zoro: lose in a sword figth with Kuina 1000 times, made promise that one day one of them will be the best swordsman, Kuina fell from the stairs and broke her neck and died, Zoro's promise was broken, decide to take Kuina's katana and became a pirate-hunter for living, later he threated Helmeppo and was tied up in the excution yard for a month starving, nearly got killed but Luffy saved him. How sad.
6. Monkey D. Luffy: Was harressed by bandits, almost got eaten by a Sea King but saved by Shanks, wants to go with Shanks but can't, was given a hat and watch Shanks sailed away. Less tragic but later he freaked out about his grandfather as if something bad happen before he met Shanks. Poor Luffy.
7. Usopp: Watchs his mom die, makes living of causing trouble in his village, spent time cheering Kaya up, found out that Khaladore is a pirate, struggles to save his village. Tragic
8. Sanji: Starved without food, nearing death. That's tough