Woah I kinda forgot about this with all that was going on IRL. Chaos is correct.

Appearing in 1, no wait 2 others. Chaos is the final boss in FF I, and Garland appears as a tribute in IX
We serve you loyally.
We will join you in fight These lines refer to the fact that it is an esper.
Until the spell strikes us down. There is a no attack field in effect when you fight chaos, so you need to use spells to win.

Your turn 6294.