Especially after he received the hidden task from Sir Morphy.
Little Brother Fu couldn't wait to serve as Sir Morphy's Assistant in the "Mystical Summoning" ritual, to further his main career task as a summoner.
Actually, Sir Morphy's plan to use the All-Seeing Device to trace back to the assailant didn't require Little Brother Fu's participation at all. Having Triss as an Assistant would have been enough, but Sir Morphy, being the cunning Dog Planner that he is, always considers the game experience of the little players, so he sent Little Brother Fu a temporary task.
This is what you call "Always prioritizing the game experience"!
The best part is, as Sir Morphy's summoner apprentice, Little Brother Fu had enough foresight not to wait for instructions from Sir Morphy. He had already prepared all the materials needed for tonight's secret summoning, and even had a backup set in case the summoning failed.
Where else can you find such a good disciple, huh?