alright so in scarlet and violet arven's dead parent is either sada or turo, right? sada in scarlet and turo in violet. the other professor is not mentioned by name in the version they're absent from, but a book in one of the research stations down in area zero states that arven's other parent (presumably the other professor) walked out not long after he was born. it's highly likely that arven's other parent is still around somewhere and i'm wondering if that might be brought up later on. even if it isn't, it's still a very interesting idea to play around with.