I think I remember the lore panel saying that Elezen have longer "age spans" than we do. Meaning, they will look like children for longer than we do (maybe until 15?) and like teens for longer than we do (maybe until 25?), and so on. So perhaps Alphinaud and Alisaie could be in their twenties. They do sound a lore more experienced and wise than their look gives, that is for sure.
To be an interesting, intriguing, well-written character, there needs to be something to allow the audience to relate to them. That is what the problem is with who wants their character to be "perfect". Perfect characters will never be strong, and strong characters will never be perfect, because WE (those who read, who watch, who RP) are not perfect.
"What makes a strong character is how they deal with their flaws, their fears, their turmoils, their troubles that get in the way. That's what makes them relatable." -- N.C.
"What makes a strong character is how they deal with their flaws, their fears, their turmoils, their troubles that get in the way. That's what makes them relatable." -- N.C.