Brewster

From Wild World Wiki

Brewster is the pigeon that runs The Roost café. When you first start chatting with him he won't be very talkative, but as the game plays out he will become slightly chattier and offer you pigeon milk for your coffee.

Brewster has quite a history with Blathers, and when Blathers is on his depressed/talkative stage (only happens very rarely) he will tell you about when he first met Brewster and how Brewster came to be in the museum in your town.