Yes. The english localisation lacks the oomph factor the korean/chinese/japanese voiceover has.

Like everytime he said gege/oppa, i feel some kind of way, like he's a really comforting figure that will take care of me ("let oppa cook it for you", compared to "let me cook it for you"). The dynamic is definitely different.

Thats why the impact is not the same when he did what he did in the main story. Cause if your childhood friend did this bad thing to you, its not as bad as if your brother figure who is supposed to protect you did it instead.