Welcome to Gaia! ::

Persona: Persona are a person's ego, manifested in a physical form and tamed. In the RP, persona can only be summoned in the midnight channel, and are used in order to fight shadows with magic, physical attacks, or to protect the user and their friends. Also in the RP, a person will gain the ability to summon their persona in a dire crisis, after which, summoning the persona can be done at will by summoning the persona's tarot card and crushing it in some way. ((If you can't come up with a persona, try using a mythical creature or figure to use for it. Like Shiva or Beelzebub or Zeus or Thor, things like that.))

Elements: Persona and shadows use elements when they attack with spells or physical attacks, the series names the elements weird, so I've decided to list em here, for reference and junk.
Fire=Agi, weak to Bufu
Water/Ice=Bufu, weak to Agi
Lightning=Zio, weak to Garu
Wind=Garu, weak to Zio
Physical=Physical (moves are named after what the attack consists of, like cleave, or sonic punch etc, make em up.)
Healing/Support=Dia
Light:Hama, weak to Mudo
Darkness:Mudo, weak to Hama

((Edit: I hot linked the spells to a list of thier names! ^w^))

Elemental spells are also organized in strength by suffixes.
No suffix: lowest level, ex: Agi
-ga: middle level, ex: Zioga
-dyne: highest level, ex: Garudyne

Also, there are spells that boost attack, magic, defense, reduce those of the enemy, and multi-target elemental spells. The multi spells start with ma-.