KOS-MOS's Emotions

 is Track 14 on the Xenosaga THE ANIMATION Original Soundtrack. It plays in the following scenes:
 * chaos has a one-way heart-to-heart with KOS-MOS aboard the Elsa in Episode 3.
 * KOS-MOS exits the Elsa alone to face the Gnosis in Episode 4.
 * Nephilim tells Shion that she must accept the entirety of her memories in Episode 8.

A version of the piece with only the piano plays in the following scenes:
 * Shion worries about KOS-MOS's newly revealed power in Episode 5.
 * Shion reminisces upon Kevin hypothesising that KOS-MOS has emotional behaviour in Episode 6.

The piece's main melody is based upon a motif that also appears in KOS-MOS Activating.