Yui had never had any experience with party quests before since she preferred to fly solo. Well, with her unique skill 'Negate', she doesn't need to worry about anything fatally wounding her since most beasts only ever use normal attacks, which don't work on her at all. And if a quest sounds dangerous, she would simply avoid it. That's why she never needed any teammates until now.
This is not a filler, but a world-building short storyline.
I hope you enjoy this section before everything falls into place hehe. Have a great read everyone!