Franz is one of the Passengers of the Lombardia and the Butler of Laxia.
For much of her life he was a mix between Father and Brother figure for her.
He is an extremely talented man. When he was found by Adol it was noted that despite being in the wilderness of Seiren for months his clothes were completely spotless and he was even drinking Tea when they found him.
During a mission to fight some Ancient Species he easily managed to defeat them with his bare hands which also proved his strong fighting-skills.
In personality Franz finds quiet a bit amusement in teasing Laxia about various topics. One of those being her attraction to Adol Christin who Franz noted was rather similiar to Laxias father in Character.