In Stoicism, one key aspect is the idea that all individuals have the capacity for moral and intellectual growth. The slave boy story could be related in that it shows that even a slave boy has the potential for such growth, which aligns with Stoic beliefs about the universality of human nature in terms of the ability to develop virtues.
In these fanfictions, Naruto's stoicism can make his relationships more complex. His friends might initially be confused as he doesn't show his emotions as openly. For example, Sakura might find it hard to understand this new Naruto at first. But some characters like Kakashi may respect his new - found stoicism. It can also make his enemies more cautious as they can't easily read his emotions.
At the moment, there's no definite information on whether Berserk manga will continue. It might, but it could also remain unfinished. A lot depends on the circumstances and decisions of those involved in its production.
Yes, it is. Berserk has a rich and engaging plot, along with well-developed characters. The world-building is also top-notch, making it a standout manga.