Sebastian didn't have the luxury of time to manage the WindSong Guild extensively, necessitating the assistance of a capable vice guild leader like Mia to help him shoulder the responsibilities.
In the game, the guild was like a big family, and Sebastian needed someone trustworthy to help him manage the affairs.
These past few days, he had been preoccupied with the affairs of the Silver Lunar tribe, inadvertently neglecting the guild's management.
It was impossible for him to personally manage every guild member, as that would be both tedious and a waste of time.
With a competent vice guild leader like Mia, he was free to pursue his interests.
Mia had roughly understood the purpose behind Sebastian's organization of this event.
Learning about the opportunity to collaborate with the somewhat famous merchant, 'I Don't Care About Money', and the chance to earn 50% of the profits from Mithril mining, she was very much interested.