>>724100763
Famdom wiki never have their source for Shiki being "currently" 16, so it's either an hoax or comes from a later New Link chapter.

Also, she is still stated as 15歳 on all the JP fan wikis.

She has always been 15 in all her main game apperances - in fact, she is the youngest girl of team Gessen, as she is actually younger than Minori.