Sixteenth Basket of Mantaos

Imagine being forced to live, after death, as incorporeal bodies trapped in a vast space of nothingness for thousands of years, with nothing to do but exchanging past memories with other cohabitants (read: weirdos).  Everybody wanted out, but there was no way to leave the Void... 
Until one day, a young man was finally summoned, as a powerful but reluctant mentor, by a bubbly and motivated but completely naive young girl. Baiyi, finally out of the Void, was the only one who could save all of the other 32 souls from their prison and his summoner might just be The Key to their freedom.
However, Baiyi had to use the techniques and abilities the other souls had taught him throughout the years, and together with his own extensive knowledge of anime and game tropes from his shady and dangerous past as an otaku, to face the biggest challenge of them all: training the clumsy young girl he was forced to partner up with… into a competent sorcerer!

EndlessFantasy Translation 

Why Did You Summon Me？

I don't think we can get any more information at the moment. Let's just wait till I get the King to my side before we perform a thorough study on her mark later. As for the War God's Sword, I'll settle the woman on my shoulder first before I check it later, Baiyi concluded.

"But it'd be a little troublesome for you to keep her by your side with the grudges between Undine and her, no?" The Alchemist asked.

Don't worry, Undine is a merchant and since she's a merchant, there's no conflict that can't be solved if there's benefits for her, Baiyi replied confidently, Just leave it to me.

He's Not As Good As You Described