Leaf

Leaf, the Fairy of Power, is a red spirit fairy and a servant of the Ocean King in Phantom Hourglass.

Biography
During the start of the game, Leaf remains imprisoned within the depths of the Temple of Fire. However, he is eventually freed upon Link's victory against Blaaz. He also opens a locked door in the lobby floor of the Temple of the Ocean King. When ten Power Gems are gathered and offered at Spirit Island, Leaf's power can be used. He uses his power to ignite Link's sword with flames that double Link's attack strength, and he quadruples it when twenty Power Gems are offered at the Spirit Island. If a Phantom or Reapling is hit from behind with Oshus's Sword while Leaf is equipped, it will be stunned. Enemies such as Bubbles, Phantom Eyes and Fire Keese can be killed directly with the sword and no longer need to be stunned first.

Trivia

 * In Phantom Hourglass, Leaf is the only fairy who is male. Furthermore, Leaf is the second known male fairy in the Zelda series, the first being Tael, the younger brother of Link's fairy companion Tatl in Majora's Mask.
 * Also in Majora's Mask, when Sakon tries to steal Link's sword in Ikana Canyon, Tatl distracts him by emitting an intense red light, much like Leaf normally does.