He is the owner of the Water Sprite Inn, the poshest inn in the seaside town of Ur.
Foss is an elderly looking man to be in his sixties with a magnificent mustache and grizzled white hair.
Foss is very polite and is willing to offer advice to his customers when they need help. Due to his many years work, he is able to read the expressions of people and can easily tell if something is wrong with them.
- Aiko Hatayama - Foss is very kind to Aiko and her entourage while they stay at his inn. He offers advice to her when is conflicted about her Hajime Nagumo after he killed another of her students Yukitoshi Shimizu.
- Hajime Nagumo - Hajime respects Foss for the service that he has provided him while staying at his inn.
- (To Aiko Hatayama): "When you’re not sure what to do, it’s okay to trust in your instincts. People often warn others that blind faith blinds you to the truth. And that certainly is the case, sometimes. But I believe people need faith in something before they can act on it. So if you find yourself stuck, I think it’s okay to just believe in what you feel is right."