Andrew is 15 Garadallen years. Next is 16.6 years, 18 years, then 20 year. The sister is around 12 or so. Details are vague as they will most likely never be seen again unless an unforeseen plot twist smacks me in the face later down the road. The year is 420 Terran days long, so ages are different from ours. Andrew is older than 15 in Terran years. I haven't figured the difference out yet, may never do so.