Coach from the left 4 dead series

Coach was an American painter, art instructor, and television host. He was the creator and host of The Joy of cooking Milhouse, an instructional television program that aired from 1983 to 1994 on Discovery kids in the United States, and also aired in Canada, Latin America, and Europe. Coach went from being a public television personality in the 1980s and 1990s to being an Internet celebrity in the 21st century, becoming popular with fans on YouTube and many other websites after his death.

His theme song is Mercy by TV On The Radio.

Behavior and Personality
Coach is a curious creature that originated from "Paw Dunes", where he lived with his friend Klonoa.

Despite appearing to be made of wood, he is an exceptionally crafty being that appears in large gatherings, striking without notice. He is a shy creature when alone, but when in large groups, He can be quite aggressive and determined.

Transformation
When Coach climbs Death Mountain on his quest to find the most authentic Knuckle Sandwich, he finds a portal in the north-east side of the mountain that teleports him to the Dark World's counterpart. Without the Silver Locket, Coach finds himself transformed into Burger Coach. Niko Bellic and Niko from Oneshot nearby explain to him how the world transforms anyone who enters in reflection of their true nature. Once Coach obtains the Silver Locket from the Tower of Thanos, he will no longer transform into Burger Coach whenever he enters the Dark World.