How old is Ultear? (after the time skip)

So, this is something that always puzzled me.

At first, I assumed that Ultear was a couple years older than Gray and Lyon, so she’d be in her early 20’s before the time-skip.

Then we had that flashback during the Gray vs Ultear fight and she looked a lot younger than them or maybe the same age.

That’s when I started wondering if perhaps she IS the same age and only her Arc of Time magic makes her seem older in the present.

I mean, magic that involves time manipulation surely must have an effect on a person’s body.

There’s also the Meredy factor. When Ultear “rescues” her, she seems to be at least 16 while Meredy looks to be no older than 5/6. If that was the case, Ultear would be around 23 before the time-skip; fitting with my first theory.

So, what do you think? Is she the same age as Lyon after the seven years or is she older? Or younger?