Which anime? There are many animes with people with the name of Yuki, but the only one I've really read is Yuki Sohma from Fruits Basket who is 16-17 throughout the manga/anime
Yuki Abe is 29 years old (birthdate: September 6, 1981).
Yuki Matsuoka is 40 years old (birthdate: September 13, 1970).
Yuki Isoya is 39 years old (birthdate: February 17, 1972).
Yuki Kajiura is 52 years old (birthdate: August 6, 1965).
When Yuki is 15 he is 19. They are 4 years apart
Now(2012),he's 35 years old.
He is roughly 17-years-old throughout the 4th season.
25!He was born on February 16 1986 :D
Yuki marry's zero
Yuki is Japanese for Snow
Yuki Jono was born on June 5, 1945.
Yuki was born on December 28, 1990.