There is a FOnewm under the hospital of Pioneer 2 who will transport you, if you have photon drop in your inventory.

You will be offered a random item for trade for all the photon drops in your inventory. More photon drops in your inventory at a time will make more items available. Some items within the minimum photon drop group appear randomly. If you add 2 or 3 minimal photon drops to the group, you'll increase the chances of the item being available. You get an option of saying yes or no to every item offered.

If you have successfully completed the online East Tower quest, and taken the necessary steps, you will be able to speak to Hopkins. Paganini will now offer to add elements to you S-rank weapons.

If you have successfully completed the online West Tower quest, and taken the necessary steps, you will be able to speak to Hopkins and add % to your weapons.

Paganini will now offer to add percents to weapons based on photon drops and photon spheres.

• 5% for 20 photon drops.
• 30% for 1 photon sphere.

Certain rules do apply, and they are:

• Cannot add percent to an S-rank weapon.
• Cannot add percent to hit attribute, even if it has minimum 5%.
• Can add percent to the same attribute multiple times.
• Can add percent to any weapon other than S-rank.
• Can add percent to a 0%.
• Can add percent to a total of 100%.
• Can add percents to multiple attributes on the same weapon. .
• You can only have % in three areas. If you do and try to upgrade an area that has 0%, thats why you'll get an error
• When using a photon sphere, you must have exactly 30% available to add it to a weapon. That means if you have more then 70% in one area, you can't use a photon sphere on that area.