I've worked on and mixed vocals for a few people (outside of AT). Ponyo's dry/unprocessed vocals sound really nice and smooth before I even do anything to them. The hard part is not ruining the vibe he naturally brings to the work and trying to lean into it.
You humble me greatly, but trust me when I say...it is difficult lol. I was not taught how to sing, so I'm always practicing and trying to find my niche