This is one of the 4 bosses of the Mountaintop. This boss uses a freezing attack, which behaves like those from the Submarine Shrine Boss, only with reduced freeze time length and firing rate. Due to the higher speed that this boss attacks from and the fact that it is immune to Ice attacks, this is more difficult boss to defeat compared to the otherthreebosses. High-damaging ranged characters, especially Snipers and Priests, will work best against this boss, as a melee will only be frozen and destroyed by the other bosses before it has a chance to attack. Poison type weapons are also considerable, especially with equipped with a Peridot. An Indra Arrow 6 is highly recommended for defeating this boss if the player is going through the stage a second time.
As with its allies, the Blue Boss Fairy Eel's head-species combination is unique.