Ace and Sabo's death, Nami and Robin's pasts, Luffy and Usopp's fight, lighting the Going Merry on brand and finally Brook's past. All made me cry and I couldn't decide which was the saddest TT^TT
In order from least to greatest 3. When Zoro swore to Luffy and Hawk-eye that he will become the gratest swordsman 2. The Last song of the Rumbar pirates 1. Ace's death
probably when they lit the going merry on brand and zei their final goodbye to it. that had me in tears. Also robins and name's past and ace's death especially.
Luffy was relatively happy, upbeat, and chipper, and smiling and laughing and I could go on and on. To see him like this during and after the war and to see how he was after he lost his crew just completely crushed my heart.