For new fans, and also to see where they come from, here’s BABYMETAL’s oldest (translated*) interview, thanks to u/YM-Japan**:
MARQUEE Vol.94 - BABYMETAL IDZ interview (December 2012)
It’s a fun and interesting interview about the song IDZ, they talk about the recording of the song, the choreo, what they like about it and some other nice details.
They also talk about Legend I (10 June 2012), which is the first time Kami Band appeared with:
Guitars: Leda & Shiren
Here’s the link to the show:
Kami Band is announced with a video at 35:20.
Pictures of Marqueet photo shoot: https://drive.google.com/drive/folders/0B64L034DuSs2UEFDY25JYmF1NjQ
* I precise translated because it wasn’t BABYMETAL’s first interview in a magazine
** Doesn’t seem active anymore, maybe he has a new account, thanks anyway !