I always saw Quina as a he. Even though he married Vivi. At the same time, Quina is just a pin-cushion (as shown by the button eyes) so probably neither a he or she. Qu's reproduce by sewing while sitting in a rocking chair at the local marsh.
...if they eat some of their children (sewing projects), then that's just bad luck .
...if they eat some of their children (sewing projects), then that's just bad luck .