For a character who has been healed in a Bacta Tank, their development could start with a sense of newfound gratitude and a changed perspective on life. For example, a battle - hardened soldier might come out of the tank with a new resolve to end the war through peaceful means.
Maybe a story where a group of rebels discovers an ancient Bacta tank with unique properties. They have to figure out how to use it to heal their critically injured comrades while being chased by the Empire. This would involve elements of adventure and survival.
In the Star Wars universe, Darth Vader was often in need of healing. The Bacta tank was a crucial device for that. Darth Vader, after many battles and injuries, might have used the Bacta tank to soothe his pain. It was a place where his damaged body could be mended. The Bacta fluid would surround him, and while in there, one could imagine him reflecting on his dark path and his loyalty to the Emperor.
One idea could be a story where a young, injured Jedi discovers an ancient Bacta Tank with unique healing properties. This tank not only heals physical wounds but also restores lost memories of the Jedi Order's forgotten teachings.
Medical droids can be main characters too. They are the ones in charge of operating the Bacta tank. A fanfic could tell the story from the perspective of a medical droid, showing how it deals with different patients in the Bacta tank, the challenges it faces in maintaining the tank, and its relationship with the living beings it heals.
Maybe Darth Vader was severely injured in a fight against a powerful Jedi. He was rushed to a secret Imperial facility where a Bacta tank awaited him. As he entered the tank, his thoughts were filled with anger at his own weakness. While in the tank, he vowed to become even stronger, to never let such an injury happen again. When he emerged, he was more determined than ever to hunt down the remaining Jedi.
In fanfiction, Anakin's character can be expanded through alternate timelines. Let's say a fanfic has him not turning to the dark side. We can then see how his character would have developed as a powerful Jedi without the influence of the Sith. It also allows for exploring his relationships with other characters like the clones in ways that the movies didn't fully cover. Writers can create scenarios where Anakin has to lead the clones in different battles and how that shapes his leadership skills and his view of the war.
One great Anakin Skywalker fanfiction is 'The Chosen One's Redemption'. It delves into Anakin's journey towards redemption after his fall to the dark side. It shows his internal struggles and how he tries to make amends for his past actions. Another is 'Anakin in Exile' which imagines Anakin living in seclusion and reflecting on his life. It gives a deeper look into his character outside of the main Star Wars narrative.
One of the best is his fall to the dark side in 'Revenge of the Sith'. We see his inner struggle with his fear of losing Padmé, and how Palpatine manipulates him. It's a tragic story of a once - great Jedi being consumed by his emotions.
Anakin Skywalker's story is one of great tragedy. Born into slavery, he had a difficult start. As a Jedi, he was in a relationship with Padmé Amidala, which was against the Jedi Code. His fall to the dark side was gradual. Palpatine manipulated him. He committed many atrocities as Darth Vader. But deep down, there was still good in him, which was shown when he sacrificed himself to destroy the Emperor.