List of quests (Zero)/Chapter 4/Orbal Staff Enhancement

"I want to perform an upgrade to that orbal staff of yours from the Epstein Foundation. Would you let me take a look? I will discuss the details in person. Come to the factory in the Downtown District."

Orbal Staff Enhancement (魔道杖の新機能開発) is an optional support request that occurs during in.

Background
The quest is available at the beginning of the third day of Chapter 4, after speaking with Doctor Guenter during Blue Pill Investigation.

The quest expires after defending the IBC during The Attack on Crossbell.

Walkthrough

 * 1) Head to the Downtown District and speak with Chief Roberts and Chief Guillaume in Guillaume Factory.
 * 2) Give Chief Guillaume a T-Material.
 * 3) *T-Material can be found in a chest accessible from the Revache & Co. Warehouse or dropped by Regenenkopf.
 * 4) If the quest isn't completed by the time The Attack on Crossbell starts, speak with Chief Roberts in B5 of the IBC, then give the T-Material to Chief Guillaume.
 * 5) *BONDING: Completing this quest earns 5 Bonding points with Tio.

Notebook

 * The Epstein Foundation's Chief Roberts, the branch manager in Crossbell, made the original request.
 * If we upgrade Tio's orbal staff, she would be able to use a powerful new craft. This sounds like a good deal for us. Let's give it a try!
 * We will need one T-Material for the modification to be performed.
 * Found a T-Material, and he performed the orbal staff modification! (When completing the quest during Chapter 4)
 * We were late, but we have the T-Material needed. Let's speak to Chief Guillaume later. (When completing the quest during the Finale)
 * Using the T-Material, he could finally perform the orbal staff modification! (When completing the quest during the Finale)