It gives her crazy stat boosts. Plus Yarne can't inherit the Wyvern Rider class from Panne, so you can cheat the system and give him a Wyvern Rider skill.
:O
Meh, it was half on accident.
And, she doesn't actually look that little. Which is weird, because I keep thinking she's supposed to be a childish elf thing.
"...update will be a bit later."
"I have received Fire Emblem Awakening. It's been the only thing I've been doing in my spare time for the past two days.
and will most likely be the death of WW XX"