Funny thing...I recently was looking up instruments, and a "masenqo" (spelled "masenko" in Dragon Ball Z) is actually a type of instrument. Go figure.
Masenko is one of Piccolo's sons; an albino Namekian born from a black egg which absorbed the evil of King Piccolo Daimao.
Masenko is born sickly and vulnerable, but grows into a very powerful fighter (inherently, and through no training of his own). He's mysterious, and possesses abilities which are unnatural to normal Namekians. He wears a white hood and cloak to protect himself from the sun.