Thoughts with Ziggy

 is a track in Xenosaga Episode II. It has not been released on any soundtrack or sound selection and not much is known about this track. Part of its melody is also used in Jr's Promise.

It plays in the following cutscenes:
 * Juli talks with Ziggy about MOMO and Sakura in the U.M.N. Control Center.
 * Juli tells MOMO about her new feelings for her before the party leaves for Old Miltia (Japanese audio only — in the English version of the game, Sakura (theme-piano ver.) plays instead).
 * Juli and Ziggy discuss the prospect of giving the latter life-extension surgery.

Thoughts with Ziggy 2
 is a track in Xenosaga Episode II. It has not been released on any soundtrack or sound selection and not much is known about this track. It is a version of Thoughts with Ziggy with different instrumentation. It plays in the following cutscenes:
 * Kevin and Shion talk about their hopes for KOS-MOS's future (flashback) (Japanese audio only — in the English version of the game, plays instead).
 * Rubedo gives Sakura's message to Juli after the first dive into her mind. (Curiously, the Japanese and English audio play different parts of the track in this cutscene.)