David Álvarez Aguirre (born 5 February 1984), known as Kily, is an Equatoguinean footballer who plays for Spanish club La Madalena de Morcín CF mainly as a right midfielder but also as a right back.
He spent his entire career in Spain, but never in higher than Segunda División B.
Kily represented Equatorial Guinea at the 2012 Africa Cup of Nations.