Each character is unique. They have their special commands in battle and not everyone can do everything.
You: This is your character. She doesn't know anything about her, not even her name.
She can drain magic from enemies. When she uses the Drain command, she'll choose an enemy and choose which skill to drain from it.
Jill: She's the captain's right hand. She's an expert engineer and will turn out really useful.
Jill can mix up batteries with special Elemental Essences creating bombs she throws at enemies during battle. When she uses her skill 'Combine' she choses two items to mix up and throws the resulting item directly to the enemy. Remember that not all combinations are possible, so when you mix something wrong you will get a basic item instead.
Zihark: Thalasias's captain. He's an ex Soldat of the U.G.A.
Zihark's body is made up of mechanical parts, which makes him a great and versatile ally in battle. By switching his Softwares he can throw flames or heal, depending on the situation.
Other characters will be available as the story progresses, with some being guests for some missions. You'll have a party of six members at the end, with the possibility to switch them in battle.