It's Yonah from the Prologue / Tokyo section of NieR Replicant / Gestalt.
Use yonah for the prologue likeness, and tokyonah for the Tokyo likeness.
This model has not been trained on any adult material, so you shouldn't need to put adult terms in the negative prompt. But you may as well, just to be safe.
I am but a humble LoRA maker. If you upload my models to another website, please include my name VisualizerPro so that others can find my models!