So anyway, Nana Asteria is one of my favorite singers because she's got super good range, diverse music tastes, multilingual, and also has that "power" singing which a lot of chuubas don't or can't commit to so they stick to soft songs. Also her talking voice and personality is really goofy. She reminds me a bit of Olivia if she was Australian/Japanese.
https://www.youtube.com/watch?v=IZGqE-qsJF8Most of her covers are Japanese.
https://www.youtube.com/watch?v=0TpeqAwJqnM&t=6272sThrowing this English song in because I've heard Filian sing the beginning part of this a few times and it's a cute song.
I won't shill her too much because she mostly sings, zatsus, and plays gacha. 