human
Subaru:  Strength drained from Subaru’s body, and he crumpled against Rem. “Re…m… What did you…?” Not only was the swaying of the dragon carriage affecting his vision, but it was swallowing his fading consciousness as well. Subaru desperately clung to Rem as it became difficult to even hold his head aloft.
gpt
Rem:  Rem gazed affectionately at Subaru as he struggled. Then, she gently brought her lips to Subaru’s ear.
human
Rem:  Whispering as if to reach the last remaining shred of his consciousness.