User blog comment:Metadwarfosis/In anticipation of volume 11- Dwarven Kingdom and Expectations/@comment-26952857-20160710150908/@comment-29248623-20160723234247

I think Shalltear was chosen as a gatekeeper.

She's the only one aside from Ainz that I know could use and maintain the Gate spell and has enough fighting power to stand alone for a while. That's how I see the purpose of bringing her.

It would be funny if they had a childish argument while in the dwarven kingdom.