I'd really love to have a continuation or widening of many characters' lines in hsr and Ratio is one of these characters.
I even don't say about his hypotetical bind with Amphoreus (however I want to have this bind and this explaintation).
I'd love to have new characters, who are bind with Ratio and especially if they are his students. He is a professor after all and it can be really cool to have characters who have learnt from him and love him or maybe argue with him. I think it'd really convey him and his "teacher" aspect. Not to mention this can be really fun or affecting interaction.













