The shield consumes no PPEC serum so it doesn't need to be recharged after a certain amount of uses. However, using the shield will make Rion's AP rise. Whilst active, a purple barrier will be summoned in front of Rion that will protect him from almost all forms of attack. By default, it will only protect him from attacks in front of his face but after upgrading it once with Skip, it will completely surround him. This power is best used to defend yourself from attacks that Rion cannot easily escape from by either running or rolling away. Also, since using the shield will increase Rion's AP, it's one method to manually force a short instead of using an Appolinar capsule.