This was kinda a hard question for me maybe not for y’all tho because I know most of u will pick ace death but I did to, probably because I was more drawn to marineford I was also spoiled aces death but it still shocked me I dint know who ace was by ik his name on the other hand corazon when he was almost killed by traffy I was like law are u slow why would u stab doffy brother and then they became friends I was surprised he dint tell on him . When doflamingo killed him I was shocked I thought he wasn’t gonna kill his brother he actually wasn’t at first until corazon slow self started talking 🤦🏽
You could have easily said emotional though. Anyways if i had to say i would have to go with Ace as for the first time we actually saw Luffy break down which was a bit off a tough pill to swallow and Garp being there didn't help too much. Corazon's death was emotional as well but never to the extent of Ace's.
Well it'd also depend on what you mean by emotional. I mean, when i saw Ace had diednfor the first time, I was filled with emotion, but it was far from sad. It was more like "why?".