Anna
Spielban and Helen's mother chose Spielban and Diana to survive by escaping in the Grand Nasca shortly before the destruction of the Clin mothership. She died but was "restored" to life in the alternate future timeline in which the Waller Empire never existed.

  Marin
Diana's mother who died when the Clin detonated their own mothership but was "restored" to life in the alternate future timeline in which the Waller Empire never existed. Not to be confused with Marin from Uchhu Keiji Shaider.

  Space Swordsman Teacher
A hologram generated by the Grand Nasca's computers to train Spielban in swordsmanship. Later trains Helen/Helen Lady in the same capacity.
Episodes 14 & 31

  Daigorou Koyama
Owner of the invention shop "Edison". He claims to be a genius and comes up with various gadgets that don't quite work out. Was once tricked into building a robot for the Waller.

  Miwa Koyama
Daigorou's younger sister. She helps out at "Edison" but is sick of Daigorou's inventions that don't sell.
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