One of my favorite moments is when Yamaguchi stands up for Tsukishima in a fanfic. It shows his loyalty and how much he values their friendship. Another great moment is when Tsukishima gives Yamaguchi some really sincere advice about his volleyball skills. It's a moment that shows he cares about Yamaguchi's growth.
A really touching moment could be when one of them gets injured and the other stays by their side throughout the recovery process. It shows the depth of their love and care for each other. The story uses these kinds of events to really explore the relationship between the characters against the backdrop of the exciting world of volleyball.
One great 'Haikyuu Yachi Fanfiction' is 'Yachi's Growth'. It shows her journey of becoming more confident in the Karasuno team. Another is 'Yachi and the Volleyball World', which dives into how she experiences the intense volleyball matches from her unique perspective. And 'Yachi's Hidden Talents' is also a good read, exploring some skills of Yachi that we don't get to see much in the original anime.
One of the best is 'The Volleyball Dreamers'. It has great character development and really dives deep into the team dynamics during the games. The story follows an alternate universe where the characters face new challenges on and off the court.
One great 'Haikyuu' fanfiction is 'The King and the Crow'. It delves deep into the relationship between Kageyama and Hinata in a very unique way. It shows their growth not just as volleyball players but also as friends. Another one is 'The Ace's Redemption' which focuses on Ushijima and his journey to become a better team player. It has some really well - written character development. And then there's 'The Little Giant's Legacy' that explores the impact of the Little Giant on Karasuno's current team in a heartwarming way.
It's hard to say for sure. Different readers might have different opinions. Some might think it's Hinata, while others might go for Kageyama or someone else.
Season 4 of Haikyuu begins approximately at chapter 290. But keep in mind that there might be some variations depending on different translations or editions.