if you wondering what happened to the voice talking to tsukasa, it was pretty much a one and done thing that only appeared in the time travel arc
yes the time travel arc isn't canon to this naruto to boruto harem series...
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anyways that's all
kobayashi herself is the only person canon in the time travel arc...
BYE :)
((The voice itself also reappears in the canon arcs of this fanfic but brief however in the boruto era it might reappear again but who knows...))