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.
Zhang Chi's last words were said at the end of the competition: " The long road is dedicated to the distance, the rose is dedicated to love, what can I give to you, my lover? The white clouds are dedicated to the playground, the rivers are dedicated to the ocean, what can I give to you, my friend..." These words expressed Zhang Chi's persistence and determination to pursue his dreams and dedication.
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.