I Hope this helps explain how Hiiragi Emuri Joining make sense , Due to her Connection to MoguGhost ,
So I Was looking up Vtuber Clips about MoguGhost and Founds this Clip : From A Clipper called JustaClipper,
The Clip's name is " Mint Finally met Mogu , Sunny And Emuri " And Essentially
Hiirugi Emuri Met and hangout with SunnySplosion and Mogu and briefly Met up with Mint Fantome and say hi to her At an Anime Con that Took place In 2024:
, Also It's seems Emuri and Mogu have been Good Friends since At least 2021, Mogu Celebrated Emuri's 2021 Birthday by drawing her A birthday celebration Fanart
and Here is Emuri's reaction to the fanart:
And Emuri and Mogu went to AWA 2022 ( Anime Weekend Atlanta Convention 2022 ) Together and They did an Stream together At the Convention :
And
Here are the Tweets about AWA 2022 from Emuri and Mogu :
So therefore It's Sorta make sense that Emuri joined Glitchstars Dreamers with Mogu because of her Close Friendships with Mogu !!