Tetra Sylphid

One of the Four Sister Espers that possesses massive wind power and lives in Sylph's Cavern. They were former fairy warriors, but were treated as espers from the powers they possess. Doubtful of humans, they were used as tools of war during the conflict between Aldore and Hess, and attacks any who comes near them without mercy using giant tornadoes and wind blades. Any who are fortunate enough to win their favor will surely gain an ally like none other.

Tetra Sylphid gains 1.5x experience when enhanced with Green Magicite, Green Megacite and Green Supercite.

How to obtain
Tetra Sylphid can be obtained after you defeat them in Sylph's Cavern. To unlock the dungeon:
 * 1) Clear Clouds of Lasting Light - Exploration
 * 2) Go to City of Illusion and talk to the ghost in front of the crystal.
 * 3) Go back to Clouds of Lasting Light - Exploration again and clear by walking to the exit manually after you have beaten the boss by selecting "Continue".

Once you have leveled Tetra Sylphid to the maximum level (30), an additional dungeon in Sylph's Cavern, Trial of the Wind Sprite, will appear. Defeat their stronger version and Tetra Sylphid will be upgraded to.

Once you have leveled them to Level 40, New Trial of the Wind Sprite will appear with an even more powerful version of Tetra Sylphid. Defeat them and Tetra Sylphid will be upgraded to.

Stats
Their resistance to sleep is +100% when they reach.

Videos
Tetra Sylphid 1★= Tetra Sylphid 2★= Tetra Sylphid 3★=

Trivia

 * They are the only Esper in the game to have a completely different appearance at their form. It is also present in their summoning animation.
 * If looked at carefully, their appearance makes up a single, giant wind sprite.