One common theme is vulnerability. Bruce Wayne, despite being Batman, is shown as a human who can be hurt, both physically and emotionally. Another theme is isolation. When he's hurt, he often tries to deal with it alone, which adds to his pain.
One popular 'Bruce Wayne hurt fanfic' could be 'Shadows of Pain'. It delves into Bruce Wayne's emotional turmoil after a major event in Gotham. The author really captures his inner struggle and how it affects his relationships with the other characters.
One common theme is vulnerability. Normally, Bruce Wayne as Batman is seen as this strong, invincible figure. But in 'hurt bruce wayne fanfiction', we get to see him at his weakest, whether it's physical injuries like being severely beaten in a fight or emotional wounds such as losing someone close. This vulnerability makes the character more relatable.
One great fanfic is 'The Father - Son Bond'. It beautifully explores the complex relationship between Bruce and Damian. It shows how Bruce tries to be a good father while also dealing with his role as Batman, and Damian's struggle to fit into this new world with his own strong - willed nature.
There's also 'Bruce Wayne's Darkest Hour'. In this fanfiction, Bruce suffers a great loss which not only hurts him deeply but also makes him question his entire purpose as Batman. It's a really engaging read as it explores the vulnerable side of this usually strong character.
He might develop a greater sense of humility. Without the Batman persona to fall back on, he has to face his own limitations as a person. For example, he may struggle to get people to listen to his ideas for change when he doesn't have the intimidation factor of Batman.
Another aspect could be that in some darker fanfics, if Bruce Wayne were to cross a moral line, perhaps Alfred would have to take more extreme measures. He might cut off Bruce's financial resources related to his vigilante activities. This would force Bruce to re - evaluate his actions and the way he operates as Batman. It's a way of punishing him to make him understand the importance of ethics even in his fight against crime.
The plot is also important. It could involve them facing a new villain or a threat to Gotham that tests their relationship. Maybe a situation where Damian's actions put him at odds with Bruce's code of ethics, and they have to work through it. This kind of plot tension can make the fanfic really engaging.
I'm not sure if there is a specific 'Bruce Wayne lemon harem fanfic' available. There are countless fanfics out there, but a harem fanfic involving Bruce Wayne might not be as common as more traditional Batman - related fanfictions. You could try searching on specialized fanfic websites like Archive of Our Own or FanFiction.net.
A great idea for a Bruce Wayne training fanfic could be his training in stealth. He would practice moving silently through the shadows of Gotham. This could include training in different terrains, like the rooftops or the sewers.