Honkai: Star Rail: The Characters in My Box Are Adorable

[Lighthearted + Honkai: Star Rail + System + from the start + brainless power fantasy + fast-paced] On a parallel Blue Star, demons run rampant, and humanity awakens supernatural abilities to fight back. Today, Jianghai received a mysterious miniature landscape box and a chibi figure of Acheron. After Jianghai placed the Acheron figurine inside the landscape box, it actually came to life! At the same time, in the Honkai: Star Rail universe, Acheron vanished, and live-broadcast screens appeared before all the major factions. Soon, Jianghai received dolls of Firefly, Jade, Robin, Yunli, Sparkle, Feixiao, and Lingsha as well. Wait, Black Handsome, Nanook, how did you get here? Huh, and Rin Tohsaka and Saber from Fate have somehow barged in too? [Ding! Landscape Box System activated] [Ding! Please help the character figurines grow stronger and repel the demon invasion] [Ding! Congratulations, Acheron has reached S-rank. Reward: 10,000 development points] [Ding! Congratulations, you have upgraded Acheron's dorm to the luxury tier] [Ding! Congratulations, you have learned Acheron's combat technique... Eight Thunders Crossing the Skies] [Ding! Congratulations on completing the ultimate mission. Every character is rewarded with a Holy Grail that can grant any wish]