"Arizona" Lauren Liveley, named Laurencia ciel Miracula on her birth, is actually a princess from Euvaria, she is the illegitimate sister of the imaginative Princess Threnody as well as being a warrior class Proclamant Wilder.
Arizona appears as a volunteer among the Solaran Guard as they march south to Lunaria to confront the massing hordes at their border. Arizona's reason for fighting is not specifically mentioned, but it seems she simply wants to find her missing sister.
She wears champion's armor and wields the Blade of Valoire and a Balthier Shield. She has hypnotic blue eyes which offset her pale blonde hair and paler complexion. Due to this, she is nearly identical to Threnody. So much so that she has been used as a stand-in when Threnody had usually made herself unavailable.
"I am Proclamant Wilder Arizona Liveley, commander of the 5th Infantry of Euvaria."
"It is the Knights' primary objective to defend the world by eliminating the darkness. I shall do all in my power to assist in achieving that end."
Ari is very similar in appearance to the Tim Burton version of Alice Liddel due to having been created to serve in her place as it was initially observed in Kingdom Hearts. The Tim Burton version was utilized in order to give her an expanded role.