After you evolve your Research trophy to Ethereal Quill... summon the artisan satchel and give it to Jolum in the bazaar.
<Receive Artisan Essence>
Jolum says 'Take this essence and put it in the appropriate container, and it will change into a new bag. Do this before your trophy evolves because this essence is delicate and will only respond if you own the appropriate trophy.'
Combine the Artisan Essence in Research Kit
<Receive Ethereal Carry-All>
<Receive Ethereal Component Bag>
The Ethereal component bag is able to hold component items only.