With this paper I pretends to do an approach to Kottos, the solo violoncello piece composed by Iannis Xenakis in 1977, from the analysis of the musical materials and its different relations trough the evolution of the piece, from a direct analogy with a mythological character that inspired its creation as well, and from extra–musical concepts around the idea of this myth. In a certain way, this piece shows us the possibility of a different comprehension of Coto, who was a horrible and isolated monster in Greek Mythology. It may show us invisible faces; perhaps it shows us Coto’s dreams and desires and how do they mix with the reality of the character and all his possibilities. But the important is that this piece doesn’t limit the giant to a simple ugly and disproportioned being, as the theologies of Greek Mythology did.