Hello! Do you have the latest version of the walkthrough? You can download it here on itch or from our website: violetstudiogames.com
It has specific instructions on how to get routes that are tied to the questionnaire!
One thing to keep in mind is that Eira's prologue starts off the same way as Vincent - you'll still go to the bank and meet him, but he won't like you as much as he does on his own route. ;)