The Japanese gaming media Denfaminicogamer recently held a project featuring a conversation between Toshihiro Kondo, the president of Nihon Falcom, the developer of The Legend of Heroes series, and David Jiang, the producer of Honkai: Star Rail.
During the conversation, David mentioned a key point, which is to enhance the immersion of the game, Honkai: Star Rail will incorporate AI technology into the NPC's behavior patterns. Although he couldn't reveal too many details, NPC's behavior in-game will feel more natural to some extent, giving players greater sense of immersion within the world of Honkai: Star Rail.
Furthermore, he also shared that each planet in Honkai: Star Rail has its own culture and level of development, as well as a corresponding story background. Therefore, miHoYo's development team has put a lot of effort into this aspect, and it takes about a year to establish just one planet.
Source: Denfaminicogamer