Porta, a childhood friend and steadfast companion in the underground society, operates as the Elder’s right hand, managing the leader’s arduous duties amid the latter’s failing health. His protective instincts extend to Patema, whose perilous explorations he discourages through fabricated warnings of bat-like creatures lurking in forbidden zones—a tactic blending genuine concern with unspoken romantic devotion that quietly motivates his choices.

When Patema vanishes into a restricted area, Porta charges after her without hesitation, traversing unknown threats to prove his loyalty. His pursuit forces an alliance with Age, a surface-dwelling teenager, despite simmering jealousy over Patema’s bond with the outsider. Though privately conflicted, he suppresses personal grievances, cooperating earnestly to ensure her survival.

During the climactic battle against Izamura, Porta intercepts danger to shield Patema, enduring a near-fatal fall that briefly suggests his demise. Survival, facilitated by external aid, leads him to openly confess his feelings, though Patema’s reciprocation remains unclear.

Known for levity amid tension, Porta peppers interactions with ill-timed jokes, his hyperactivity contrasting a relentless sense of duty. He adheres unwaveringly to the Elder’s commands while spearheading rescue efforts, embodying resilience in balancing unrequited affection with unwavering support for those he values.

The prequel ONA *Patema Inverted: Beginning of the Day* features Porta in a minor role, though existing materials omit elaboration on his background or expanded development within these narratives.