My Rooks in a list:

Brahm - They'd sing Once Upon a Dream by Lana Del Rey and do fine!
Caspar - He'd get super hammered and slur out some ABBA.
Jacinto - He'd be too shy 😖
Heron - Teenage Dirtbag. He would give it his everything and sound great.
Ludwig - Sweet Disposition. Tone deaf. A for effort.