So, I rewatched Godzilla Resurgence, and I decided to listen to the english versions of some of the songs and uh, apparently "Who Will Know" this song -

Is from Shin's POV ... So yeah, I feel really bad for him, because he's apparently in a lot of pain and I also noticed that when he roars it's more like he's screaming from pain, because his mouth opens a lot wider than any other Godzilla's