Laxia von Roswell (ラクシャ・フォン・ロズウェル) is the daughter of the noble Roswell family of Garman. A refined and well-mannered personality suiting her status as a noble. However, given said status she often struggles to adapt to the ways of Drifting/Castaway Village and its vastly different cultures and people, but nonetheless strives to help Adol and the others using the knowledge she acquired under her father's tutelage.
Laxia was the first drifter found by Adol who was taking a bath on a river. She has a wide knowledge concerning the Ancient Species taught by her father, the Head of the Roswell family.

At first she was irritated from Sahad's natural behavior however she grew weary of her attitudes towards others especially to Adol and started to change. Laxia has a bit of embarassment when she talks with Adol while the latter teases her as she periodically comes close to confessing her feelings for him.

On the ending scenes, Laxia reunited with her father at the Gllia Academy where she is studying abroad. She's smoothly restoring her family's status of nobility and been authorized to research the Ancient Species. And at the end of credits, she and her father stands on a well preserved fossil of a winged ancient species. The place they were was not mentioned, but it is likely that they are in fact on the Isle of Seiren.