He's a young man who works as Westown's mailman. Though he's a good person, he's viewed as insincere because he enjoys ridiculing others. He believes it to be rude to not make a move towards women, though this slowly changes after meeting the female protagonist. Because of his line of work, his area of activity is vast.
Spoiler warning: The following may contain important story spoilers.
Wayne is an only child and was raised by his now deceased grandparents because his parents were always on trip around the world. 
Wayne's parents have always been wandering around the world since he was young so he doesn't have many memories of them three living together. His father loves doing astronomical observation and he used to tell him loads of stories about constellations and space. That's why after Wayne moved to his grandparents' place, he had always climbed up to the roof and took his constellation books with him to do star observation himself.
Despite living apart from his parents, Wayne denied about ever feeling lonely as his grandparents' were raising him with kindness. Even so, since he and his parents had been apart for too long, sometimes he did feel that he may forget about his own parents and it made him very sad, and to counter that feeling, he went to gaze at the sky on the rooftop. That way, he felt that he could remember and hear his father's voice telling him stories of constellations and his mother laughing when he do that.
He used to think when he was little that if he kept on staring at the sky, he might have been able to catch a sight of shooting star too so that he could wish his parents to come back soon.
He hasn't seen his parents anymore since he became an adult, but they do still keep a close contact; sending letters and presents to each other during special anniversaries. Wayne's relationship with his parents was also his motivator to become a postman: to connect lonely person living apart from their family like himself through the letter he delivers.
According to Wayne, he first came to Westown after he became a postman, though this was a while ago.
Milk and Crackers (ひとかけらの休息) is Wayne's light blue love event.
*Own a cow
No lover or husband
Monday - Friday
6:00 - 7:00
But I like it, so I don't mind
Yeah. It's really tiring and hard
*Wayne [+2000] *Wayne +15 attention]
Leaving the house in the morning, Wayne greets Holly and he notes that she's up early. He is on his daily mail rounds. He says that it must be difficult to be a farmer.
But I like it, so I don't mind
Wayne is impressed by her answer. He says that, to give her more energy, he'll give her a present. He hands her some crackers that he made the day before. She tries and enjoys them. He notes that they're even better with milk. Holly says that she is about to milk the cows, and invites Wayne to come along.
After milking, the two sit in Holly's house and enjoy the milk and crackers. He is surprised that fresh milk would taste so good. He asks her why she wanted to become a farmer, and she explains that she is still trying to gain Daryl's approval. He tells her that, since he had never seen her at work, he couldn't understand how such a pretty lady would do something so dirty. He says that while she is absorbed in her work, she is "stunning."
Wayne apologizes for taking up her time and thanks her. He excuses herself so she can get back to work.