Board Thread:Theories and Rumors/@comment-30938718-20180803102949/@comment-36963373-20180923192754

It is confirmed that nya is two years younger than kai and the rest of the ninja. It is also confirmed that Lloyd physically aged up to nya’s age and his emotional age is two years younger than that. Meaning that Lloyd is mentally 4 years younger than the ninja but physically 2 years younger. Also Harumi was most likely 10 and Lloyd was 11 when the great Devourer struck in season 1, making her about 14 at the time of her death.