Back in the Fortuna office, head to the Bloom Palace and talk to Tiki to have Tsubasa learn her “Feel My Voice” radiant skill. Return to the Illusory 106 Idolasphere and make your way to the 5th floor.
Once there, don’t enter the giant blue maid outfit yet but go to the dead-end to the right instead. Here’s you’ll find a container containing a Treasure Key and a locked chest containing a Bracelet of Eternity. Talk to the friendly mirage nearby to accept the request “Repel the Rejects”. Hunt the necessary mirages listed below to get their “force” and deliver them to the mirage to get your reward, another Treasure Key. All of these mirages can be found in this floor and above.
Once you’re done, enter the maid costume to reach the mannequin display. Select the MIDDLE one then enter the costume once again to reach the next floor.
Continue forth and continue to the circular room. Activate the portal and get the Revival Bead x1 and First Aid Kit x2. Continue to the next orange giant maid costume to back down to 5F.
Continue forth and destroy the wall past the orange mannequin display. Activate the LEFT switch of the orange display then go back to the orange maid costume. Enter the sleeve to reach the other side in the same floor.
Destroy the wall to the right then get the Bead Chain x1 from the container in the corner. Go back to the orange mannequin display and switch to the MIDDLE this time. Continue to the blue maid outfit then activate its corresponding mannequin display; select LEFT. Go back to the orange maid costume and climb up to the upper floor.
Ignore the mannequin display ahead then destroy the wall near ledge to the left. Continue towards the blue maid outfit. If you changed the position of its sleeves earlier before going up to this floor, you should be able to reach the two item containers in the isolated portion of this floor. Loot the containers to get 4,500 yen and Detritus x10.
After getting the items, backtrack through the blue maid costume again, then go down to 5F. Head to the blue mannequins display and select the MIDDLE one. Don’t enter the blue maid costume yet; instead, backtrack to the orange maid costume again and use it to go back to 6F. Now operate the RIGHT most switch. Go around to reach the blue maid costume you adjusted earlier to go back to 5F once again. Make your way to the orange maid outfit so you can go through to it and reach 7F.
Upon reaching the floor, turn to the left and follow the corridor to find a container in the dead-end containing Chakra Drop x2. Backtrack to the main path, continue forth until you reach the circular room with yet another portal and stairs going to the rooftop. This is a good time to go back to Fortuna if you want to heal up and resupply. Save your game here as well since you’ll face this Idolasphere’s boss. When ready, exit through the door and climb the stairs to the rooftop to trigger the next cutscene.
Boss: Aversa
You’ll be facing Aversa and two Umber Pegasus Knights. They’re the same as the sub-boss you faced in the lower floors. It’s weak to Blunt (Axe), Ranged, Fire, Force, and Darkness while having the resistance only against Slash attacks. Like always, you need to prioritize taking out these minions first to prevent enemy Session attacks from triggering.
If you have Itsuki’s Rakunda learned, use it as early as you can to lower the enemy party’s defenses. Like before, Touma’s Fire Strike skill can trigger a full session with Itsuki and Tsubasa, allowing you to destroy an Umber Pegasus Knight in a single session. After taking out the Pegasus Knights, Aversa will use Dark Envy, a move that will lower the target’s DEF, HIT, and EVA.
Aversa is weak against Elec and Force, so Itsuki and Tsubasa can take advantage of their Zio and Zan skills. Be careful of her Rush skill as it can deal a very significant damage. Heal as often as you need since her reinforcements will re-appear after two turns. You’ll have to repeat the same pattern but if the reinforcements appear when Aversa’s HP is very low, concentrate your attacks on her to finish the battle quickly without bothering with her minions.