Senor Alvaro is Charlie Bone's music teacher at Bloors Academy. He only appears in the last book, and he is revealed to be endowed and making Charlie think that his mum and dad are only a boat called the Greywing. He is on Charlie's side, and is one of the only people that know Lyell is the Red Knight with Gabriel Silk's father, Mr Silk. He takes part in the final battle, and is injured but cured by the cats. When the academy becomes Bone's Academy, he takes over as the head of music when Dr Saltweather becomes headmaster.