I thought I'd share my own interpretation of the song! It's clear that the lyrics are pretty closely linked to the legend, which Avu has said intrigued her from a young age.
I believe that when Avu sings in her normal voice, it is her Avu-chan persona representing Faust. Avuchi is her recently revealed pop idol persona, who represents Mephisto in this song. Of course, this is just my interpretation based on recent QB lore, so it may not be completely correct!
思ったより早く時は過ぎ
飽くなき心は彷徨い
動けない身体を無理矢理追い剥ぎ
引っ掴む幕切れよ
The moment passed faster than I thought
My insatiable heart wandering
Taking my motionless body by force
The conclusion I reach for
I was only jealous
I wanted to try
Suddenly I wanted to throw away what I’d received
Stiffening fingertips, drooping eyelids
Grant my wish, I order you!
さあ儀式を致しましょう
法則を壊し理をも抜け出して
指切りをしましょう
過去すら翻し約束を繋ぎ果て
Let’s perform the ritual
Break the rules and defy reason
Let’s pinky swear
Change the past and fulfill our pact
“You called?”
Everyone out there, hello!
It’s me, Queen Bee’s idol,
Avuchi from Hell!
Everyone, today until the last
We’ll have as much fun as we can! Yeah!
思ったよりむしろかなり好き
たちまち夢が呪い合い
濁れない孤独とときめきを特別、祈りと呼ぼうか
I like it rather more than I thought
In an instant, my dream met with a curse
Shall we call this unwavering solitude and excitement special, or a prayer?
Let’s continue the ritual
First the shadows will dance, and a voice will be heard from far away
Let’s pinky swear
Selling out names and simmering expectations
When I hit the sky with random nails
The sad starry sky will be complete
It’s beautiful, but looking up at it
A person gives up on their wish and leaves it in their eyelid
あなただけは違うんでしょう?
さあ指切りをしましょう
So you’re the only different one?
Then let’s pinky swear