AIEEEEEEEEEEEEEEE SAKANA I KNEEL
Tenma's right hand is weird. On her left hand she's touching her thumb to her two middle fingers to make the fox head, but on her right she's just touching her thumb to her pinkie. I'm not sure if that's a mistake but it looks like one.
Could this be Star Ring's Uyu Hitori?
Compare the voice in the debut teaser with this clip.
In particular the extended "-mase" at 0:12 in the teaser and at 3:51 in the clip
They do sound similar. Good catch. Do you know more about Star Ring that you could share? Why did they shut down?