Summon (...would be the name of the special command, but there is more to the ability than just the command)
Idea related to the fact that she is a magitek experiment. The idea is that she was the result of research into methods of creating a better magitek soldier, capable of absorbing more of an esper's power. This resulted in her deformed appearance -- she's forcibly been made to "absorb" a lot of different espers, becoming not quite a half-esper like Terra, but some sort of esper chimera. Or something like that.
So anyway, the ability. She can instantly cast any spell teachable by whichever esper she currently has equipped. In addition, she can summon the equipped esper an infinite number of times, instead of only once per battle (as per the unused "summon" command). This is because, unlike the other characters, she's been "modified" to instantly form a very strong bond with the esper/magicite. Possibly she's almost "possessed" by the esper.
However, she can only cast the spells of the currently equipped esper, because the old bond is instantly replaced with the new one, if she uses a new magicite.
This circumvents the need to give her a unique magic list. That isn't the main reason for doing it, though. I think a new magic list is doable, and would even be a fun challenge. Mainly I just like the idea.
Idea related to the fact that she is a magitek experiment. The idea is that she was the result of research into methods of creating a better magitek soldier, capable of absorbing more of an esper's power. This resulted in her deformed appearance -- she's forcibly been made to "absorb" a lot of different espers, becoming not quite a half-esper like Terra, but some sort of esper chimera. Or something like that.
So anyway, the ability. She can instantly cast any spell teachable by whichever esper she currently has equipped. In addition, she can summon the equipped esper an infinite number of times, instead of only once per battle (as per the unused "summon" command). This is because, unlike the other characters, she's been "modified" to instantly form a very strong bond with the esper/magicite. Possibly she's almost "possessed" by the esper.
However, she can only cast the spells of the currently equipped esper, because the old bond is instantly replaced with the new one, if she uses a new magicite.
This circumvents the need to give her a unique magic list. That isn't the main reason for doing it, though. I think a new magic list is doable, and would even be a fun challenge. Mainly I just like the idea.