When I came up with the symbols, that was more to denote the entire profile is region locked or region-limited (like Megaromania or Laputa, for example). For artists where a significant chunk is missing or locked, I'd use a spade (♠) as most of their works are still available.
HPのURLがサーバー側の都合で変更になっているようです。
https://2nd-a-rebellion.aremond.net
↓
https://2nd-a-rebellion.aremond.com
It doesn't seem like Noel's twitter / Instagram was linked. ^-^
https://twitter.com/NOEL_botsu
https://www.instagram.com/noel_botsu?igshid=OGQ5ZDc2ODk2ZA%3D%3D&utm_source=qr