It could also be that Lupis failed to follow Ainz's orders precisely. In the world of the light novel, if Ainz has a certain strategy or mission in mind, and Lupis deviated from it, he might lose his temper and yell at her. For example, if they were in a battle situation and Lupis made a move that put the whole team at risk, Ainz would likely be very angry.
In many light novels, characters often have complex relationships. Ainz yelling at Lupis might be related to a power struggle. If Lupis was trying to assert herself in a way that Ainz saw as a threat to his leadership or plans, that could be a reason. Or perhaps Lupis accidentally revealed some secrets that Ainz wanted to keep hidden, and his yelling was a reaction to that.
One reason could be that Lupis's actions had negative consequences for Ainz or their associated group. If Lupis's deeds led to losses, whether it was of resources, reputation, or something else, Ainz might yell at her out of anger and disappointment.
Yes, he can be considered evil. Ainz in the 'Overlord' light novel often engages in actions that are morally dubious from a human perspective. He rules his new world with an iron fist, using fear and power to subjugate others.
In addition to the above, there are other characters like Demiurge. He is highly intelligent and helps Ainz in ruling and strategizing. His devious mind comes in handy when dealing with various threats and political maneuvers in the world of the light novel. And then there's Sebas Tian, who is known for his honor and combat skills, often being sent on important missions by Ainz.
Ainz uses his undead minions to intimidate the local populations. He also manipulates the political situations in different regions to his advantage, which can lead to the downfall of kingdoms and the suffering of many people.
Another theme is loyalty and betrayal. The various characters around Ainz Ooal Gown, such as his subordinates, have different levels of loyalty. Some are blindly loyal, while others might be thinking about their own interests, which creates a complex web of relationships full of the potential for betrayal.
Albedo is an important character. She is deeply in love with Ainz Ooal Gown and is extremely loyal to him. She is one of the most powerful guardians in Nazarick, and often takes charge of various matters in the fortress in the name of Ainz.
Often, these fanfics highlight the power dynamics between Ainz and Narberal. Since Ainz is a very powerful being, the stories may show how Narberal respects and follows his lead.
Well, it could change the perception of Ainz's power. If it's in an anime - only fight, it might show a different side of his combat abilities that the novel readers didn't expect. It also might affect the overall story arc in the anime adaptation. Maybe it's a way to introduce new elements to the anime's world - building.
The battles in the Ainz Ooal Gown light novel are quite exciting. Ainz often has to strategize against opponents who may not be as powerful as him but are numerous. His use of different spells and his ability to think like a gamer gives him an edge in these battles. For instance, in the battle against the lizardmen, he has to balance between showing his strength and also trying to gain their loyalty in a way that is beneficial for his long - term plans.
Mrs Black could be so offended that she starts to plot against Hermione. For example, she might try to get Hermione into trouble with the Hogwarts authorities by spreading false rumors about her.