One popular 'sirius teases harry fanfic' might be 'Pranks and Protections'. In this fic, Sirius uses his mischievous nature to tease Harry in a light - hearted way. For example, he might transform into different animals to startle Harry and then laugh it off. Another could be 'Family Bonds', where Sirius teases Harry about his crush at Hogwarts while also giving him valuable advice on how to handle relationships.
You can try fanfiction.net. It has a large collection of Harry Potter fanfics, and there's a good chance you'll find some 'sirius teases harry fanfic' there. Just use the search bar and type in the relevant keywords.
One possible scenario could be Sirius noticing how Harry blushes whenever Ginny's name is mentioned. So he might say something like, 'Harry, I've seen you go redder than a Weasley's hair at the mention of Ginny.' Another could be if Ginny gives Harry a special gift, and Sirius teases him about it, 'Harry, that little present from Ginny must mean something special, eh?' A third scenario could be when Ginny is around and Harry acts a bit clumsy. Sirius would then joke, 'Harry, you're more out of sorts than a drunk Hippogriff when Ginny's near.'
Yes, there are likely some fanfics out there with that premise. The Harry Potter fandom is vast, and fans often come up with creative and alternative family relationships in their stories. You can try searching on popular fanfic websites like Archive of Our Own or Fanfiction.net.
It's also likely that they go to Romania. Given Sirius' knowledge of the wizarding world, he might know of a safe haven there. In Romania, they could be around dragons and learn about dragon - related magic. Harry would surely be fascinated by the dragons and it could be a place where he can grow stronger in a different kind of magical environment.
The relationship could also take a more complex turn. Other characters might get involved in their conflict. Some might side with Sirius, thinking Harry was in the wrong, while others might try to mediate. This outside influence could either help or hinder the mending of their relationship, depending on how it's handled in the fanfic.
Their relationship would be severely damaged. Harry would likely feel betrayed by Sirius. After all, Sirius is supposed to be one of his protectors. It would be a huge breach of trust. Sirius, on the other hand, would probably be filled with guilt if he realizes his mistake. He would have to work hard to regain Harry's trust, if that's even possible in the context of the fanfic.
Sirius helps Harry become more confident. By sharing his knowledge and experiences, Harry feels more capable. For example, when Sirius teaches Harry a difficult spell, Harry realizes he can master things he thought were out of his reach.
One common theme is mentorship. Sirius often acts as a mentor to Harry, guiding him in the wizarding world. Another is family. Since Sirius is like family to Harry, the fics explore the concept of a non - traditional family. And there's also the theme of adventure as they usually go on some sort of adventure together.