Skills

Skills are available to everyone in Valkyrie Profile, and are learned by spending CP, or Capacity Points, which are acquired every time an Einherjar levels up. The amount of CP acquired is increased by a whopping 100 points when the Emerald Necklace is equipped, so make sure you give it to an Einjerjar who is close to levelling up! You'll need Skills in this game in order to prepare Einherjar needed for Valhalla. Every Sacred Phase, Freya will request a specific type of Einherjar to be transferred, with a certain Skill preference. This means that if she demands a Warrior with Demon Int skills, you had better put your CP into the Demon Int skill! Level the skill up as much as you can.

Skill levels usually go up to 8, but some skills, like Counter Attack, do not require any more learning to be effective; thus you will stop learning this (and you can fully utilize this) at skill level 1. There are four kinds of Skills- Reaction (activates in battle, and after being attacked), Support (activates in battle, during various intervals), Attack Skills (activates in battle, when you attack), and Status Skills (may increase certain Einherjar stats, or serve a purpose in transferring Einherjar to Valhalla).

Reaction Skills

Reaction Skills ("A") are the most important skills, imo. They can be set up in the Skill Set Up Menu, which is done in Memory Camp (Status screen). You can set up to two Reaction Skills (A1 and A2) to be used at one time.

Support Skills

Support Skills are your secondary, "B" skills, and will execute automatically, like Reaction Skills. Good to have, yeah, yeah.

Attack Skills

Attack Skills ("C") are quite useful. The only downside to them is learning how to master them, since they can only be triggered with the directional button before the einherjar hits its target. As if you didn't have enough buttons to hit during battle! So these skills can go either way; if you're willing to get the hang of them, they will come in handy, however, you may just totally forget about them while attacking, which means you'll have to plan who attacks first, second, third and last, strategically, so you don't miss the opportunity to let your Attack skills fly. A sword symbol will appear above the attacker's head, signalling when you can use the set skill (depending on your skill level).

Status Skills

Your "D" skills are different in the sense that you will not set them. They more or less affect your stats for the better, though most of them will only be useful to Freya. Yes, nearly half of Status skills only raise INT or nothing at all, but maxing them out is the key to your Einherjar's survival (and your success at the Sacred Phases) when they are sent to Valhalla. A few are much more valuable, raising attributes like DME, but for a hefty amount of CP.