Neju Na Melmas serves as high priestess and spiritual leader of Melmas, her childlike appearance belying centuries of existence—her age ambiguously recorded as anywhere from 500 to over 2000 years. Political leaders deliberately halted her maturation through “age-fixing” to suppress her powers, leaving her emotionally and physically static yet sharpening her intellect to outmaneuver political adversaries. She evaded assassinations via body doubles and strategic telepathy, wielding abilities that escalated from paralyzing individuals to swaying collective thought. Upon nearing her priestesshood’s end, she fled Melmas to evade succession and assassination, enrolling in the Galaxy Police Academy under Seto Kamiki Jurai’s mentorship and joining the Kamidake II crew.

Her bond with crewmate Seina Yamada became pivotal. She formed an instant attachment, sparking jealousy among peers, and shadowed him during critical missions, including the hatching of Fuku—a cabbit integrated into their ship. Tensions flared when her identity was exposed via a necklace, prompting her to paralyze crewmates as a warning, though cooperation during a pirate assault eased hostilities. Later, on Earth, she deployed a body double to assist at Seina’s home while covertly studying his past.

Following a rogue Galaxy Army faction’s defeat, she agreed to a political marriage with Seina, though the ceremony was disrupted. Her motives wavered between authentic affection and a longing to shed her priestess obligations. Post-retirement, her suppressed maturation resumed, amplifying her powers. She later mentored Kenshi Masaki in resisting mental manipulation, with mixed outcomes, and left indirect legacies in conflicts involving Core Crystal-enhanced artificial humans. Her influence rippled beyond her timeline, echoing in spin-offs such as *Tenchi Muyo! War on Geminar*, where her impact surfaces through others’ actions.