It's hard to say for sure. The availability of Venti in the story depends on multiple factors such as the story's genre, setting, and the author's intentions. It could be possible, but you'd have to look closely at the story's details to know for sure.
Yes, you can get Venti from the story. In the game's story, Venti is a key character. His story is intertwined with the lore of Mondstadt. For example, his role as the Anemo Archon is revealed through various quests. These quests show his connection to the city, its people, and the overall history of the region. He has a carefree yet mysterious personality, and his actions in the story often have a significant impact on the events that unfold in Mondstadt.
Well, in a Venti identity reveal fanfic, it could involve Venti dropping his carefree bard facade and showing his more divine or ancient side. It might include scenes where he has to use his true powers to protect Mondstadt from a great threat. And this could lead to a whole new understanding of his character by the people of Mondstadt and the readers of the fanfic.
Another possibility is that it could be a normal citizen of Mondstadt who has a special connection or intuition. This person might not be as powerful or important as Jean or Diluc, but they could have a moment of realization. Maybe they see Venti do something that defies normal human capabilities and start to suspect that there is more to him than meets the eye.
We can come up with the plot introduction for the 45th episode of Human Fireworks. In this episode, Tan Yansheng's time-honored restaurant, Damalou, experienced a series of changes. Tan Yansheng and Xiumei's wedding banquet received Zhang Huize, Sun Jiliang and Gu Shun as three disciples. However, his second disciple, Sun Jiliang, secretly colluded with others because of his love, causing Tan Yansheng to lose all his property and commit suicide by throwing himself into the river on the day his son Tan Wenhua was born. Sun Jiliang occupied the horse beating building, and Gu Shun suddenly disappeared. The eldest disciple Zhang Huize and Siping rescued Xiumei mother and son from Sun Jiliang and promised to keep the "horse building" for their master. However, after liberation, Sun Jiliang was beaten into a capitalist, and the "horse building" was confiscated by the government and turned into state-owned assets. This was the plot introduction for the 45th episode of " Human Fireworks ".