In some cases, Dante could distance himself from Nero for a while. He might go off on his own to cool down and think things through. Meanwhile, Nero could be left feeling guilty or confused about why Dante got so angry.
One possible reason could be Nero's over - eagerness or recklessness. Maybe Nero keeps getting into dangerous situations without proper planning, and Dante, being more experienced, gets pissed off at Nero's lack of caution.
The letter could potentially contain details about a Nero fanfiction writing competition. It could be inviting Dante to participate or perhaps it's just informing him that a story he might be interested in has won the competition. You know, it could also be a letter from an author who has written a Nero fanfiction and is seeking Dante's opinion on it, since Dante might be well - known in the fan community.
There's also a possibility that it's Trish. She could be calling to warn Dante about a new threat that she has discovered. Dante would trust her information and start to make preparations to face this new danger.
After Natsu gets angry, the plot might develop with other guild members trying to mediate. Happy might try to calm Natsu down while Gray could be in the middle trying to make both sides see reason. This could create a lot of comical and tense moments in the fanfiction.
Well, in the fanfiction, perhaps it's a call from an old friend who needs his help. Dante might then gear up and set off on a new adventure to assist his friend.
Maybe in the fanfiction, Nero has made some decisions that go against Trish's beliefs or values. For example, if Nero decides to trust a character that Trish knows is untrustworthy, it could make her angry.
It might become strained. They could start avoiding each other for a while until they resolve the issue. In some cases, Trish might be less likely to help Nero in his quests or battles if she's really pissed off.
They have a complex relationship. Sometimes they're allies, sometimes they have conflicts, but it's all part of the story's intrigue.
He might be excited. Dante is often associated with Nero in the same universe, so he'd probably be interested in what the fanfiction has to offer.
The 'harry gets pissed fanfiction' might center around Harry experiencing a range of emotions that lead to him being pissed. It could be due to a betrayal, like if someone he trusted in the fan - created story did something against him. It might also be related to his goals being thwarted, for example, if he was trying to achieve something important and someone or something got in his way.