Perhaps Chica was acting out of a sense of loyalty to someone. If the 'perv' had wronged a friend or someone she cared about, she could have been avenging them. Also, it could be that she was following some sort of internal moral code within the fanfic's universe that dictated such actions against immoral characters like the 'perv'.
For Bonnie and Chica's wedding fanfic, it all started with Bonnie's proposal. He had planned it for weeks. He took Chica to their favorite spot in the pizzeria and got down on one knee. Chica was overjoyed and said yes. As the wedding day neared, they invited all their friends. The wedding was a beautiful affair. There were flowers everywhere. Bonnie and Chica were both beaming with happiness. They had a wonderful ceremony and then a grand reception where they shared their first dance as a married couple.
The main characters would be Chica and Foxy. Chica is often portrayed as friendly and perhaps a bit naive in some interpretations, while Foxy is usually seen as more of a daredevil. In the context of a mine fanfic, their personalities would play off each other as they face the challenges within the mine.
One good 'foxy loves chica fanfiction' could be where they go on an adventure in the pizzeria together. Maybe they discover a hidden room and have to rely on each other to get out.
You can try searching on some popular fanfiction websites like Archive of Our Own. There are often a lot of different fanfictions about various characters, and you might be able to find ones related to 'foxy loves chica' there.
One thing that makes it interesting is the setting of the FNAF world. It's a dark and spooky place full of mystery. Foxy and Chica's comfort story against this backdrop can be really engaging. For example, they might be trying to comfort each other during a power outage, which is a very tense situation in the FNAF lore. Also, the exploration of their personalities beyond their basic traits in the context of providing comfort can add depth to the fanfic.
Maybe the mine is haunted, and Chica and Foxy are the only ones brave enough to explore it. They start out as rivals, each thinking they can solve the mystery of the haunted mine better than the other. But as they encounter more and more spooky events, they realize they need to work together. Through shared scares and investigations, they fall in love.
To write them well, you need to understand their backstories. Withered Bonnie has been through a lot, maybe he's seen better days. Toy Chica is newer but might feel out of place among the older animatronics. Use their backstories to create believable interactions. For example, Withered Bonnie could be jealous of Toy Chica's newness at first, but then grow to appreciate her uniqueness.
Another plot might be a mystery - solving one. There could be something strange going on in the pizzeria, like missing parts or strange noises. Withered Bonnie and Toy Chica team up to figure out what's behind it all. Maybe they discover a long - forgotten secret about the place that changes everything for them.