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.
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.
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.
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.
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.
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.
It could be that Peter's immaturity showed in a crucial situation. He might have been over - confident and tried something really risky without thinking it through. The Avengers, being more experienced, would be frustrated with his recklessness and thus yell at him. They want him to learn and grow, but his actions might have been too much to tolerate at that moment.
Maybe the boss was frustrated and took it out on the man. As for the kid, perhaps the cat did something to annoy them.
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.
Yes, he might have some unique descriptions related to his appearance which could be considered as his 'skin' in a sense. In the web novel, his skeletal form is often described in detail, which is a distinct part of his overall 'look' or 'skin' in the context of the story.