Nissa

Nissa is a selkie and she is the gatekeeper of Magix's ocean portal.

Appearance
Nissa is a selkie who wears purple, with butterfly like shapes on her hat and she has green eyes. Her forehead symbol is pink and shaped like a four-leafed flower.

Season 5
Nissa was companing Phylla, Lemmy and Illiris for unknown reason at Neptune's palace, where Phylla told Neptune how Lemmy saw Tritannus turning queen Ligea and Nereus into mutants. After Tritannus shows up and turns his father and sister, Tressa into mutants, he gladly steals away Nissa's powers, so he can get to the oceans of Magix to pay a little visit for Daphne along with Trix.

Nissa appears later with the rest of the selkies when the Winx open the gate to the Infinite Ocean. However earlier in the episode Nissa saw Tritannus enter Lake Roccaluce and went to warn the other gatekeepers.