Melody of the Sea

Here is another sketch done about 4 or 5 years ago for (another) former friend of mine, whose Saint Seiya's favourite character was Siren Sorrento.
As said elsewhere, since I love not this character very much, I decided to draw him in an informal dressing, playing his flute.
I entirely used a purple soft pencil, but I don't know why it resulted to be shocking-pink

Siren Sorrento belongs to Masami Kurumada.