Shiori's voice

[Muxxer]

I just noticed that Shiroi's voice changes by the end of her route. Did they not have the other VA's recordings of those scenes?

[PGBP88]

the game originally got voices for the Dreamcast and PS2 ports. For the PSP port,rather than just re-using those recordings,they brought the cast to re-record new lines(but only partially for key scenes,so it has fewer voiced lines than you would hear in the DC/PS2 versions.Plus,they replaced Shiori with the same VA who played her in both the 2002 and 2006 anime adaptations since the original one from the DC/PS2 versions had since left the industry after being blacklisted for speaking out against harassment and indecent proposals she was receiving to get cast for new roles).
The Switch/Steam port mixed both the PSP and the original DC/PS2 recordings to create a more complete and definitive experience. However,this ends up creating inconsistent performances when you mix in recordings done in 2000 with the ones done in 2007. They also brought Shiori's second VA to re-dub over the previous one's lines in this version for consistency,but apparently some of the previous VA's lines were left in,likely an oversight in the mixing's process