No way they were assigned train pun names at birth... these boys are trans and they picked train names themselves

Inverse to the 'Emmet thinks Ingo has a daughter now;' Emmet hears the phrase 'uncle Ingo' once and gets scared that he accidentally made Akari at some point ??

Alternatively Akari gets sent back to before Ingo even got eebied and shows up at the station to cause some,, misunderstandings

BALLIN