You can already redeem the 4.5 livestream codes and claim the respective rewards, following the broadcast of the special event. As a live-service game, the popular RPG developed by HoYoverse frequently gets new patches that add more content, including new playable characters, areas, events, quests, and more. The patches also tend to bring forth fixes to bugs and quality-of-life updates. Before every update goes live, however, the developer hosts a livestream, which is dedicated to showcasing a large portion of the new additions. Chiori’s leaked kit in 4.5, for instance, should be confirmed during the event.