All links are gauged by a Link Level, the bonding level between you and your partner and increases through its own experience points called Link EXP. The more link points earned per battle, the more support abilities unlocked. Its also possible to interchange link partners with your reserve comnbatants through battle, which is called the T-Link. It can be done many times, once per turn Eventually, a successful link attack will earn one Bravery Point. Earn enough and a Link Rush can be performed with a single partner, or a Link Burst with your whole party.