Imagine being a new recruit to Hololive, only to be kept in the basement for two years, until the right person graduates. Praying every night for two years that please, please let Kiara graduate so you can take her spot on Hololive's roster.
Then finally, finally you get your chance. Someone graduated and your gen can finally debut!
And then you learn that it wasn't even Kiara who left, but the detective you oshi'd.