Many people often notice a reality in anime series, especially shonen series where the main characters often lose their parents at a young age or do not live with their parents.
Perhaps the most common way for anime characters to lose their parents is to die tragically.
A good example of this contrast is the main character of Naruto and his friend Sasuke Uchiha.
If a main character loses his or her parents because they were killed, that could become the driving force behind this main character’s actions.
However, in many anime series, the main character’s parents are still alive but do not appear.
Besides, in many anime series, the main character’s parents are alive but they do not raise their children for many different reasons.
Even without parents, the main characters can still have a fulfilling life with good friends and people who care about them.
In general, the fact that the main characters do not have parents in their lives is a way to develop the story line in many different directions.