Avigator is a character that first appears during the quest "Avigator". After you finish his quest, you will often see him flying above your town like other visitors in his airplane. If stopped, he will usually spend around two or three hundred coins, 1-3 times in the same shop (so 200 to 900 total). He will spend much more during a Fiesta. His name is a play on the words "Aviator" and "Alligator".
"This village is beautiful but it might be even more beautiful from the sky."
You will only see Avigator flying above your street after you finish his quest.