An Esper of unknown origin. Makes a Shell to protect the party.Final Fantasy VI PlayStation esper section
Zona Seeker is a brown, red and black creature which floats. Its body is mostly skeletal and has no legs, while it appears to also wear a cape.
Zona Seeker was one of several espers captured by the Gestahlian Empire during their first raid on the esper world. The captive espers were taken back to the Magitek Research Facility at Vector, and for sixteen years they were experimented on and had their magic drained to develop the Empire's Magitek army.
When the Returners infiltrated the facility and shut down the machinery draining the espers, they were too late to save them. With too much of their energy drained, they transformed into magicite and entrusted themselves to the Returners.
Zona Seeker is a rather useful magicite for the first half of the game, as many bosses rely prominently on magic and it is quicker and more efficient to summon Zona Seeker than cast Shell on each character. In the later game it is rendered obsolete by Strago's Mighty Guard, which grants the party both Shell and Protect.
Zona Seeker teaches two very important spells at very high learn rates, so party members can equip it for only a couple battles to learn them. It also teaches Shell the fastest of any esper the party can obtain for much of the game; only Alexander teaches it faster.