Before she became a household name in adult entertainment, Momoka Nishina started as an underground idol. Like many aspiring Japanese performers, she participated in small‑scale music and dance activities that gave her a first taste of the spotlight. This idol background would later help her project a more polished, “girl‑next‑door” image on screen.

She has expressed interests in tea parties—specifically favoring Rose Hip tea—and enjoys a "rose motif" in her personal style, often opting for frilly and floral outfits.