Barrier

Barrier (リフレク) is an ability that appears in Kingdom Hearts Birth by Sleep and Kingdom Hearts III. It momentarily forms a spherical shield of light around the user, fending off enemy attacks.

When used by Aqua, the barrier forms from blue light to create a sphere of transparent hexagonal panels with a violet hue, with an extra ring of hexagonal panels around the outer circumference.

When used by Terra, Ventus, or Aqua on their Keyblade Gliders, the barrier forms from white light and the panels take on a violet hue.

Guardian Form's barrier in Kingdom Hearts III forms from white light. The panels appear to be white-hued with a mother of pearl sheen.

Riku's version of the barrier in Kingdom Hearts III is nearly identical in appearance to Aqua's, but forms from violet light. When used in conjunction with Mickey, it instead forms from yellow light and the panels take on a white hue.

When used by Kairi, the barrier instead forms from yellow light, and the panels take on a pink hue. The additional ring of panels around the circumference is instead replaced by a series of pink light projections of Kairi's Thalassa Shell good luck charm, interspaced with small orbs of yellow light.

Mechanics
In Kingdom Hearts Birth by Sleep, Barrier is a exclusive to Aqua that is triggered either on the ground or midair by pressing  while stationary or walking. Holding the button extends the duration of the barrier whenever any attacks come into contact in succession. If used in midair, it cancels the user's momentum. Barrier has a maximum level of 3.

In Kingdom Hearts III, Barrier is an. When used, the user surrounds themselves with a barrier that blocks attacks from all directions. When used by Riku while Mickey is in the party, Barrier will summon Mickey to Riku's side to shield them both; if Mickey is knocked out, using Barrier will simultaneously restore his health. Barrier has a duration of 0.83 seconds.

Kingdom Hearts Birth by Sleep

 * Aqua has Barrier as an initial command.
 * Aqua can purchase Barrier from the Command Shop for 200 munny once one world is cleared or the command has already been obtained elsewhere.
 * Terra, Ventus, and Aqua can use Barrier while riding their Keyblade Glider.

Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-

 * Aqua has Barrier as a default ability.

Kingdom Hearts III

 * Guardian Form has Barrier as a form ability.
 * Riku has Barrier as a default ability.
 * Aqua has Barrier as a default ability.

Kingdom Hearts III Re Mind

 * Kairi has Barrier as a default ability.

Kingdom Hearts Birth by Sleep
Barrier is used to meld the following commands:
 * Barrier Surge
 * Time Splicer
 * Mine Square
 * Renewal Barrier
 * Confuse Barrier
 * Stop Barrier

Kingdom Hearts III Re Mind
Dark Riku can use Barrier during his data boss fight.