Kyoya is 15 in the first season, and 16 in the second and 17 in the last one. Every season, they gain a year of age. Ginga is 12 in the beginning and 14 in the end. Ryuga is 13 in the beginning and 15 in the end.
Ryuga is 13 yrs old in the beginning, every season he is a year older. In metal fusion he is 13, then in metal masters he is 14, and in metal fury he is 15.
