A common theme is friendship. Many fanfics explore how Aerith and Tifa, despite their initial differences, become close friends. Another theme is mutual support. They often rely on each other in difficult situations. For example, in some fics, when one is in danger, the other comes to the rescue. And there's also the theme of female empowerment. Together, they show that women can be strong and independent and still have a great relationship.
I've heard of a fanfic that focuses on their emotional connection. It's called 'Heart to Heart'. In this story, Tifa and Aerith have long conversations that reveal their insecurities and hopes. Through these exchanges, they form a strong bond that helps them both in their fight against the darkness.
Another theme is the exploration of their differences. Tifa is more of a fighter, while Aerith has a more spiritual side. Fanfics play with these differences, like in some where Tifa protects Aerith physically and Aerith protects Tifa spiritually.
The fanfic 'Aerith and Tifa: Bonds Beyond Crisis' is also a good one. It delves deep into their characters and how they support each other during tough times in the story's universe. It's full of emotional moments and great character development.
In this kind of fanfic scenario, Tifa might start by simply being there for Aerith. Just sitting quietly beside her, offering a silent presence that says 'I'm here for you'. She could then gently ask Aerith what's wrong. Maybe Aerith is worried about the future of their world or something personal. Tifa, with her strong and empathetic nature, would listen intently. She might share some of her own experiences to make Aerith feel less alone. For example, if Aerith is feeling like she's a burden, Tifa could tell her about a time when she also felt that way but overcame it with the help of her friends.
There's a fanfic called 'Aerith and Tifa's Shared Journey'. In this fic, they embark on a journey to find a lost relic. Along the way, they face many challenges that test their bond. The writer does an excellent job of portraying their individual strengths and how they complement each other. It's a great read for fans of their relationship.
Love triangles are also a somewhat common theme, not just in the context of their relationship with Cloud but also in relation to other characters. Some fanfictions might introduce new characters and explore how Tifa and Aerith's relationship is affected by new romantic interests. This can lead to complex emotional dynamics, with them having to navigate their feelings for each other, the new characters, and their loyalty to their friends in the story.
Archive of Our Own (AO3) is another excellent place. It has a well - organized tagging system. So, you can easily filter and find 'aerith tifa fanfic' based on different criteria like rating, length, and genre.
Perhaps Aerith is feeling depressed because she feels like an outsider in the group. Tifa realizes this and makes an effort to include Aerith more. She starts by taking Aerith shopping for new clothes or accessories. As they walk around, Tifa talks about how everyone in the group values Aerith for who she is. She shares stories of how each member has been positively impacted by Aerith's presence. This helps Aerith feel more accepted and slowly lifts her out of her depression.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of Final Fantasy fanfictions, including those about Tifa and Aerith. Just use the search function and type in 'Tifa x Aerith' to find relevant stories.