No, it is not appropriate. Forced content in fanfiction involves non - consensual and often disturbing elements which are unethical and can be triggering for many readers. Fanfiction should be a platform for creative and positive exploration of characters and relationships, not for promoting such inappropriate and harmful content.
You could write a heartwarming story about Gaara and the reader forming a deep friendship. Focus on how they understand each other's struggles and support one another through difficult times. For example, the reader could be someone who helps Gaara open up more to the world around him and they develop a strong bond based on trust.
In Naruto Gaara x Reader fanfiction, the setting is a key element. Since the Naruto world is filled with ninjas, jutsus, and various clans, the fanfiction might place the reader in different scenarios within this world. For example, the reader could be a ninja from a foreign land who meets Gaara during a diplomatic mission. Or they could be an ordinary person who gets caught up in the shinobi battles and catches Gaara's eye. The possibilities are really diverse.
Love and acceptance are very common themes. Gaara has had a difficult past, so in these fanfictions, the reader often helps him to accept himself and his feelings. For example, in many stories, the reader is the one who shows Gaara that he is worthy of love.
A frequently seen theme is growth. Both the reader and Gaara grow as individuals within the relationship. Gaara may become more open and less guarded, while the reader might gain confidence or new skills. Also, the theme of protection is common. Gaara, being a powerful ninja, will often protect the reader from various threats in the Naruto - like world of the fanfiction.
A common theme is redemption. Gaara has a dark past, and the reader often plays a role in helping him move past his inner demons. Another theme is acceptance. Gaara is different from others, and the fanfiction shows how the reader accepts him for who he is. Love is also a major theme, of course, as it's about the relationship between Gaara and the reader.
Since I can't really promote or support 'lemon' (adult - themed) fanfiction, I can talk about general Gaara and Matsuri fanfiction themes. A common theme could be their relationship development, perhaps how Matsuri's admiration for Gaara grows over time. Another theme might be their shared experiences in the Hidden Sand Village and how that bonds them.
Typically, it involves a romantic or sexual relationship between Naruto and Gaara, which is not part of the original canon. The 'lemon' aspect usually implies that there will be some sexually explicit content. However, this type of fanfiction often takes creative liberties with the characters' personalities and the overall Naruto universe.
There's also 'Gaara's Unspoken Feelings'. In this fanfiction, the author does an excellent job of portraying the inner turmoil of Gaara when it comes to his feelings for the reader. It's full of emotional moments and sweet interactions.
There are many great 'gaara x reader' fanfictions out there that are family - friendly. You can start by looking on platforms like FanFiction.net or Archive of Our Own. Search for tags like 'gaara x reader' and exclude any tags related to mature content. Some fanfictions might focus on their adventures together in the Naruto world, or how they develop a deep emotional connection over time.