The field "Age" in the Character Infobox refers to age in which year? Sonea appears in two trilogies, first as a young girl then as a mother. A span of ~20 years separates the two trilogies, does it not?
Magicaid is right then. That should put her at about 16, or at most 17. Childrens voices change and boys develop their Adam's apple at about 15-17. It would be obvious that she's not a boy if she still has a soprano/alto speaking voice.
All things considered it may be fair to place her age at just under 17 at TBM:Novice, since she joined with the Summer intake.
Anyway, I was wondering why the character infobox has age in it, but the main character's age wasn't given.
Would you consider perhaps having a statement/estimate of the character's age once for each book/trilogy? I think that would be better than a range or starting age (at introduction).