Our dark lord-Sasuyu 2-TAP RPG App

Dark lord, we’re in trouble!
I thought we were living a trouble-free life, but now I realize our capital reserves are at 0, friends 0, level 0!
A weak dark lord has been born, penniless and without allies!
Nothing we can do. I’ll have to help out the dark lord.
What is the true identity of the sharp-tongued, lazy girl that suddenly appeared?