Someone know the name of the singer?

[StarCloud]

She was in recent Ghibli wo Utau Concert. What's her name and does she do other music?

 

[Decretum]

That’s Remi Matsuo from the band GLIM SPANKY.

I’m not very familiar with the rest of their musical output (besides knowing that it exists), but here’s their YouTube channel: https://www.youtube.com/@glimspanky_official/videos