Zorond Ron is a treasure hunter and biplane pilot featured primarily within a time-travel narrative during the movie celebrating the children's book series' 30th anniversary. He is implied to be Zorori's biological father, having left his family when Zorori was young, which leads to their initial failure to recognize each other upon meeting in the past.

During the film's events, Zorond Ron assists Zororene—Zorori's mother, then a fashion design student—in aiding Zorori and his companions Ishishi and Noshishi after they crash-land in the past due to a malfunctioning time machine built from an alarm clock. He intervenes to help them reclaim their time machine after it was confiscated by police and threatened by a kaijuu (monster). This collaboration demonstrates his adventurous profession and willingness to support Zorori's group.

His relationship with Zororene positions him as a figure from her past connected to Zorori's lineage. Their reunion during the time-travel incident marks the first direct interaction shown between Zorond Ron and his son, filling a gap in Zorori's paternal history.

His role remains confined to this film, clarifying Zorori's family background and helping resolve the time-travel conflict.