User blog comment:FairyRaven/Fairy Tail Chapter 421: Wendy and Chelia, Review and Commentary/@comment-24360548-20150224232958/@comment-7418318-20150225150541

Sure they CAN change, but they don't HAVE TO change.

Puberty or not, growing is something that depends on the individual. Some grow sooner, some grow later and as Makarov, Yuka and some others proof, some don't grow at all (at least not taller than Wendy already is).

And after puberty a single year isn't likely to leave any physical changes apart from growing hair and maybe scars.

And as far as mental/personality changes go, they aren't what Besterverunited was talking about or what I was answering to. "[,,,] time skip was pointless for character looks [...]"