Mission 92: Xion
 Mission assignment
 Story summary
Roxas regrets his decision to leave Organization XIII. A hooded Xion approaches him with sea-salt ice cream at the Twilight Town clock tower. This time, she reveals to Roxas that it is time she "play her part" and absorb him to further Xemnas's plans.
 Mission walkthrough
Day 357 takes Roxas to Twilight Town. Go to the Station Plaza, and save for the last time. Purchase any needed panels at the Moogle Shop near the far edge of the area. Walk up to the tower and choose to head up. A cutscene will play, then the boss battle with Xion's four forms begins.
 Challenge Mission
Obtaining three Challenge Sigils is easy, as long as you jump to avoid Xion's attacks.
This Challenge Mission should be easy with the Zero Gear and three Ability Units. Use Limit Breaks to your advantage as to get through the first three battles quickly, and use a Limit Recharge in the fourth battle. Know how to predict Xion's attacks and avoid damage as often as possible.