TV-Series
Description
Dr. Ren, originally named Rinka Ren, is the creator of the advanced combat androids known as Humaritts. She designed these artificial humans, including notable Triple Series models such as Lila (codenamed ZZZ). Her background reveals a dual identity; she is also the Humaritt Triple X, wielding gold-plated P-38 pistols and possessing enhanced physical capabilities. This makes her both the Humaritts' creator and one of her own creations.

Her disappearance at the series' outset scattered the Humaritts, leaving many in the hands of criminals or terrorists. This event triggered recovery missions by the CRI's Intelligence Bureau, primarily assigning agent Najica Hiiragi and Lila to retrieve the rogue units. Dr. Ren later relocated her research and remaining Humaritts to a fortified, remote facility under Shinba Industrial's jurisdiction. There, she safeguarded Alpha, the sole male Humaritt, intended as the core component for mass-producing next-generation models.

In the climax, Dr. Ren confronts Najica and Lila at her Shinba Industrial stronghold. Partnered with Shinba's private army for protection, her plans are nevertheless thwarted by their infiltration. The confrontation culminates in Dr. Ren's defeat. Her fate remains unresolved following this encounter, with no subsequent appearances or developments in official media.

The manga adaptation features slight divergences in mission details and ending specifics but retains Dr. Ren's core role as the Humaritts' creator and her final stand against the protagonists. No additional backstory, motivations, or post-series developments are elaborated in other seasons, films, or spin-offs.