He has an exceptionally great hearing, while she has an exceptionally great sight. For them to meet in this world of stone, they're really meant to complete each other. The journey is long and grueling, but they could run through as long as they're together.

[Slight various x reader || following the manga] "There is," Senku said. "one science that I could never master..." he paused and looked at you. "Yours." But you didn't feel that way, you completely disagreed. In this stone world, your talent was basically useless.