Sunny's dialogue is in all caps.

[hallow fog]

I only just started playing last night, but whenever I talk to Sunny, his dialogue is in all caps. It does not happen in cut scenes though. Does not interfere with gameplay though. Just a bug I thought I'd report.

[marsh spade]

It's intentional. Someone said he might be a bit deaf since he's old so he needs to talk loud to hear himself

This has been reported a few times. If it was bug I think it would have been fixed earlier so it must be intentional.