The designer's name is Inande Luisa and her website is here
https://illumaamigurumi.com/It's in Portuguese, I think... but you can also find the English patterns on her Ravelry page here
https://www.ravelry.com/designers/inande-luisaAnd she has some stuff on her YouTube channel too
https://www.youtube.com/@illumaamigurumiSome examples of the BL character amigurumi patterns she makes:
Given - including the whole band, plus guitars and drum set
MDZS - both main characters and the rabbits lol
Sasaki to Miyano - both main characters