One common theme is unrequited love. Maybe Adrien has feelings for Marinette, and when he sees Luka getting close to her, he gets jealous. A plot device could be misunderstandings. For example, Adrien might misinterpret an innocent gesture between Luka and Marinette as something more. Another aspect could be the internal struggle Adrien faces. He might be too shy or afraid to admit his feelings, but the jealousy makes him more aware of them.
Often, the jealousy in such a fanfic can lead to character growth. Adrien could start to realize his true feelings for Marinette more clearly. The fanfic might also explore the friendship dynamics. Maybe Adrien and Luka are friends, or at least acquaintances, and this jealousy creates tension in their relationship. There could be a lot of brooding from Adrien's side as he tries to figure out what to do about his feelings and how to deal with Luka's presence.
One common plot could be that Adrien sees Luka getting closer to Marinette. For example, at a music event where Luka is performing and Marinette is clearly impressed. Adrien might start to feel jealous as he has feelings for Marinette himself. He could then start to act out of character, perhaps being a bit more withdrawn or overly competitive when Luka is around.
One common scenario is Adrien seeing Marinette and Luka on a date. He might feel a pang of jealousy and then try to interfere in a clumsy way. Another is when Luka gives Marinette a special gift, like a song he wrote for her, and Adrien gets jealous because he wishes he could do something that unique for Marinette.
He could also start acting out of character. Maybe he becomes more competitive towards Luka. If they are both in a band or something, Adrien might push himself harder to be better than Luka just to get Marinette's attention. He could also be more snappy or short - tempered with Luka, even if he doesn't mean to be.
Some fanfictions might have the theme of Adrien's jealousy leading to self - improvement. He realizes that his jealousy is unfounded and decides to work on himself. This could involve him becoming more confident in himself and his relationships. Or it could be that his jealousy actually pushes Nathaniel and the other character closer together, and Adrien has to learn to accept it and move on.
A common theme is also the search for hope. Beast Boy might start to lose faith in his ability to get better. The plot could involve him meeting a new character, either a mentor or a fellow sufferer, who helps him see the light at the end of the tunnel. There could be internal monologues where he battles his negative thoughts and tries to find reasons to keep going.
In many such fanfictions, Adrien's jealousy can be a driving force for character development. It might lead to him realizing his true feelings for Marinette. For example, he could start to notice how much he cares when he sees Marinette and Luka having a great time together. This jealousy can create interesting scenarios like Adrien trying to be closer to Marinette or even getting a bit possessive in an endearing way.
Often, in 'Camp Half - Blood' Percy jealous fanfics, the plot device of a special quest is used. A new character is chosen for a quest that Percy thought he should be on, and he gets jealous. This could be because the quest is related to his area of expertise or because it gives the new character a chance to shine. It then leads to Percy trying to find his own way to be involved or prove his worth, which adds depth and action to the fanfic.
With his other friends, Adrien's jealousy can make him seem preoccupied. If they're all hanging out and Luka and Marinette are interacting, Adrien might not be as engaged in the group activities. His friends might start to wonder what's wrong with him and try to cheer him up, but he'll still be focused on his jealousy towards Luka.
Common themes in 'Adrien snaps fanfic' include the internal struggle within Adrien. He has to balance so many aspects of his life, and when he snaps, it's often a result of that imbalance. For example, his dual identity as Adrien and Chat Noir can cause a lot of stress. Additionally, themes of friendship and love play a role. His friends' reactions to his snapping can be a way to explore the depth of their relationships, and in some cases, his relationship with Marinette might be affected or even strengthened by his snapping episode.
The theme of brokenness is often present. Adrien's depression makes him feel broken, like he's losing himself. Fanfic authors explore how he deals with this feeling of being shattered. Additionally, the theme of friendship and love as a remedy is quite common. His friends or a special someone's love and support are shown as a way to pull him out of his depressive state.