I was talking to Phoebe (an uchi villager) in her house and she asked to trade items. I agreed, we traded the items, and she went into happy/whistling mode. When I next talked to her, her voice was way higher pitched! Not to the point where she sounded like a peppy villager, but noticeably higher than her regular uchi voice. Is this normal?
Yep, this happens with all personalities. It's adorable. The same thing happens when they're mad or sad. Mad makes them sound all angry and tone deaf/off-pitch(not as high as happy, but still noticeable), and sad gives them a deeper, more softer voice.
...I never knew this. Honestly, that's really neat! I keep my volume down pretty low while I'm playing too, so... I'll be sure to turn it up to see about this!