One common scenario is when Draco is in trouble with other students, especially Gryffindors. Snape steps in and defends Draco, using his position as a teacher to put the other students in their place. For example, if Harry Potter and his friends are confronting Draco about something, Snape would quickly come to Draco's side.
One common scenario could be in the face of other students' bullying. Snape might subtly step in and stop the bullies without making it too obvious. For example, he could give the bullies extra assignments or detention, which would indirectly protect Hermione from their taunts.
Snape could also assign Draco to do research on a particular dark magic item or spell. This would be a punishment as it would involve a lot of time and effort, and also expose Draco to the dangerous side of magic that Snape wants him to be cautious about. It also gives Draco a chance to learn more about the consequences of misusing magic.
One common scenario could be that Harry is caught sneaking around the Slytherin common room or stealing potions ingredients from Snape's stores. So, Snape and Draco might make him do extra detention tasks like scrubbing the cauldrons for hours without magic. Another situation could be if Harry is suspected of cheating in a Potions exam. Draco might report it to Snape, and they could punish Harry by making him redo all his Potions experiments from the semester.
One common scenario is Snape protecting Draco from the other Death Eaters. Since Draco is young and somewhat naive in the ways of the Dark Arts and the Death Eater world, Snape steps in to keep him safe. Another scenario could be Snape helping Draco with his schoolwork, especially in Potions. Snape, being a master of Potions, would be able to guide Draco and boost his confidence in that subject.
A very common scenario is at mealtimes. Naruto might save a seat for Hinata or share his favorite food with her. Also, when Hinata is injured, Naruto will stay by her bedside, showing extreme worry. And sometimes, Naruto will find himself getting jealous if other guys are getting too close to Hinata, which is a clear sign of his crush in the fanfiction world.
One common scenario is when Percy is forced to go on yet another dangerous quest without much support from the gods. He might be angry and show his hatred at that moment. For instance, if he is sent to retrieve some powerful artifact with very little information and no real backup from the gods.
One common scenario is when Snape is in a vulnerable situation, like during a DADA class. His boggart - his father - might appear and start berating him for being a wizard or for being different. This shows Snape's insecurities about his identity.
Another scenario could be during battles. Naruto might be inspired by the Fourth Hokage's battle strategies. He may think to himself, 'What would the Fourth Hokage do in this situation?' and then try to act accordingly. In some fanfictions, Naruto even visualizes the Fourth Hokage beside him, giving him advice during tough battles.
One common scenario is after a fight with Voldemort or his followers. He might get injured and start limping as a result. Another could be when he's in a hurry to save someone, like Harry Potter perhaps, and in the process he injures his leg.
A common scenario is when Hermione is getting along well with Harry or Ron. Since Draco has a complex relationship with them, seeing Hermione so friendly with them can make him extremely jealous. For example, in some fanfics, when Hermione is laughing and joking with Harry during a party, Draco can't help but feel a pang of jealousy.