Oops, I never responded to this. No, I dualized with NiGHTS, which is how you traverse the world with him/her (him for me because I'm a dude)
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Qua860604912 commented on Can you tell me then what's with the capitalized consonants and lowercase vowel?
The lowercase i is likely the imaginary number "i" or represents the various "ideya" cores that make up the personality, which you need to retrieve alongside NiGHTS in order to overcome your nightmares.