In Final Fantasy XIII-2, it is revealed through the Arbiter of Time that this Lightning is only an exact copy of the actual Lightning that lacks a soul. She can learn all of the elemental spells just like her original counterpart, and has improved tiers in Thunder spells. One other significant difference is that this Lightning can cast Curasa and Curaja as a Medic, while the original Lightning could not.
Doesn’t she look beautiful? Just like the character herself! If anyone happens to know who the cosplayer is, please do let me know so that I can credit her! Thanks to Tricia for sending this in!
Source: Final Kingdom