Who could be the main antagonist in a 'hurt reader meets Tikki and Plagg' fanfiction?

The plot might start with the hurt reader running away from home after an argument with their family. They end up in a magical garden where Tikki and Plagg are. Tikki offers the reader some magical treats that have the power to heal emotional wounds. Plagg, meanwhile, teaches the reader how to be more carefree. The reader then has a series of adventures with the kwamis, learning important life lessons along the way and eventually mending their relationship with their family.

It could be a powerful alien warlord who wants to use the dying reader's unique energy for his own evil purposes. Since the reader is in a vulnerable state, this antagonist sees an opportunity to gain power.

Honestly, it's hard to pick the 'best' writers as there are so many talented ones. However, [writer's name 3] has written some really unique fanfictions. They explore the more philosophical aspects of Tikki and Plagg's existence. And then there's [writer's name 4] who is great at writing humorous fanfictions about the two kwamis. Their dialogues are always on point and make the stories really enjoyable.

One adventure could be that they accidentally get separated from their holders and have to find their way back. Tikki might use her ability to sense positive emotions to lead the way, while Plagg complains the whole time about being hungry. Along the way, they encounter other kwamis who either help or hinder them.

Well, they could get into all sorts of mischief. Maybe they decide to play a prank on their holders. Tikki could use her positive energy to create an illusion of a delicious macaron that Plagg can't resist, but when he tries to eat it, it disappears. And then Plagg could use his Cataclysm to create little harmless 'disasters' like making a small pile of papers look like they've been completely destroyed, just to make Tikki gasp in surprise.

It could be Nightmare. Since he often causes chaos in the multiverse, he might see the connection between the reader and Geno, Fresh, and Error as a threat to his plans. So he tries to break them apart or use the reader against them.

Perhaps an organization that is trying to steal Sakura's medical knowledge for their own evil purposes. They view Tobi as a threat because of his combat skills and the fem reader as a potential source of information about Sakura. So they send their agents to target all three of them.

In this fanfiction, the main characters are Plagg and Marinette. Plagg is an important figure in the Miraculous world. He is often associated with chaos but also has a soft spot for certain things like cheese. Marinette is a central character in the Miraculous Ladybug series. She has a double life as a normal girl and Ladybug. When these two meet, it creates a situation full of potential for interesting stories as their worlds collide.

In the 'tikki meets nooroo fanfiction', the two central characters are Tikki and Nooroo. Tikki is known for her positive and energetic nature, always guiding Marinette in using the Ladybug miraculous. Nooroo, on the other hand, has been somewhat forced into serving Hawkmoth. Their encounter in the fanfiction is likely to be full of contrasts and potential for change in their situations.

It's hard to say which one is the sole main character. Gabriel has his own goals and plans which are central to the overall story of Miraculous. When he meets Plagg, his character development could take a new turn. On the other hand, Plagg is such a fun and unpredictable character. His reactions to Gabriel and how he might thwart Gabriel's plans could also make him a main focus. So in this fanfiction, they are both likely to share the role of main characters.