Interestingly their natures imply they are avatars of the two aspects of what is described as the Light of Nature, the power that resides in the Shards of the Kingdom of Light and Ultras.They are also based on the concept of Ying and Yang Luna Mode techniques were for a peaceful solution to a conflict, while Corona Mode was a battle form. Their relationship is based on Cosmos' two original forms, Luna Mode and Corona Mode.Luna presumably bestowed morality and psychic powers, Corona would thus bestow violent tendencies and physical might.Д«last merging with Luna and Corona Trivia Bestowing of Power: Both beings can bestow their power onto others, this is most likely done by partially merging with the being.With Blast's seeming death at the hands of a possessed Ultraman, their fate is uncertain. Unlike the others Blast choose both for he did not believe any being was devoid of either good or evil and the two got their wished and merged with him. Some centuries afterwards they encountered Blast and offered him the same choice they offered everyone else. Later, Ultraman Tiga, a servant of the villain Mirror Master, chose Luna and turned to the side of good rebelling against his dark master. The giant chose Corona, due to his nature as a spectral intelligence that relied on instinct and thus changing his physical nature and appearance.

Sometime in the past they encountered Mirror Master and offered him a choice. However, the two can never stray from each other and thus even their mergers with others cannot complete them. Two beings representing Reason and Instinct, they are never far from the other, their shared desire is to be whole, a complete being, to that end they offer their power to any worthy being they meet, a choice between the Light of Reason or Instinct.

Ultraman cosmos luna mode