Fatal Bullet may not be your typical role-playing game filled with swords, magic, and monsters, but your party members still have roles to play during combat. And, as with almost any RPG team, you're going to want to bring a healer along for the ride. There are several healing skills in Fatal Bullet. Some directly restore your health, while others can cure status ailments. Several of Kirito's friends have these skills (namely Sinon and Asuna), so if you're finding progress difficult, it may be worth considering these party members so that you can keep your health topped up. It's also worth mentioning that your own character can learn these skills as well, as can ArFA-sys, your custom companion.