one piece anime sanji

No, Sanji is not dead in the One Piece manga. He's still an important and active character.

Overall, Sanji's character development is consistent in the manga and anime. The anime does a good job of bringing to life the growth and challenges faced by Sanji as depicted in the manga. There might be some small differences in the pacing or emphasis, but the core aspects remain the same.

In One Piece, Sanji had many abilities after awakening the bloodline factor. Sanji had four bloodline factors in his body, and their abilities were similar to an exoskeleton (Body of King Kong, similar to the steel claw effect of Marvel Wolverine), super recovery (similar to self-healing factor, able to quickly recover from injuries), strength beyond humans (possibly from the Giant Tribe), and invisibility (an ability that was a combination of the battle suit and the bloodline factors in his body, which was related to the ability of the Demon Fruit). In the plot of the Land of Harmony, after Sanji's bloodline factor awakened, his body became [Indestructible Body], which could instantly heal injuries and destroy Quine's machete. The battle suit had a certain effect during the awakening process of Sanji's bloodline factor. It could interact with the bloodline factor in Jerma66's body, strengthening the body's ability and attributes, increasing its power. However, the battle suit itself did not have special attributes. Its main purpose was to strengthen existing abilities. If Sanji wanted to become stronger, he still needed to constantly work hard and fight.

Maybe he's facing a really tough situation or got his heartbroken.

No, Sanji doesn't die in the One Piece manga. He's still an important and alive character.