You can't discredit it. "Another" can make sense. Just see what his name is in another language and see if No Heart or Another matches it and I'll believe that theory.
Kimi wa ne tashika ni ano toki watashi no soba ni ita
Itsudatte itsudatte itsudatte
Sugu yoko de waratteita
Nakushitemo torimodosu kimi wo
I will never leave you







