Click the inventory button or press I to to open the inventory window. Double-click the weapon you received. Equip the weapon, and talk to ClairWright.
Clair Wright: Let's take a look at your equipment! Click the Status Clair Wright: button under Character in the on-screen menu or press Clair Wright: C to display the window. The boxes around Clair Wright: your basic attributes show the items you have equipped. NakanoAzusa: All I have is a weapon, clothes, and a pair of shoes. Clair Wright: Well, Regenshein wasn't built in a day, so don't worry Clair Wright: too much about it. I know! I'll give you an extra Clair Wright: piece of equipment to boost your spirits. Clair Wright: Here, take this weapon. NakanoAzusa: Thanks, but I already have one of those. NakanoAzusa: Wait - where were you keeping that? Clair Wright: All right! Now click on Inventory under the Character Clair Wright: menu button or press the I key. You can double Clair Wright: click the weapon I gave you or drag it to the Clair Wright: appropriate slot in the Character Info window. NakanoAzusa: That's simple enough. Clair Wright: Equip the weapon I gave you and talk to me again. Clair Wright: Don't throw away the old weapon, though! You'll Clair Wright: need it for your next quest.
Reminder Dialog
Clair Wright: The easiest way to equip is to double-click the item's Clair Wright: icon. It's best to equip the strongest items you have!