Serena

Serena is the gatekeeper of the recently resurrected home world of Domino's ocean portal, and Bloom's bonded selkie.

Physical Appearance
Serena has a pale pink-blue skin and blue tail. She has flame patterns on her tail. She wears a blue spiral shell shaped hat decorated by an orange veil. She has a flame-shaped symbol on her forehead, repersenting the divinely and almighty Great Dragon itself.

Personality
Serena is a nice, sweet selkie.

Season 5
Serena first appears in the twelve episode of the fifth season, "Test of Courage," when her magical powers are stolen by Tritannus. She later bonds with Bloom,the princess of Domino,when the Winx Club (minus Musa and Tecna) go to find the Gem of Courage. She also appears in the next episode, when the Winx go to fully obtain Sirenix and cross the Sirenix Gate. She is seen with the other Selkies, Winx, and Guardians of Sirenix converging their magic to help the Winx gain Sirenix.

Trivia

 * Serena seems to come from word Serenade. Since she is an creature of ocean, her name could be slightly similiar to word "siren" which means mermaid.
 * Serena bonded with her fairy faster than any other selkie.