Klein is a modest and dedicated young man. Despite being the heir of one of the most powerful houses of Etruria, he treats everyone equally regardless of their social status, a trait inherited from his parents. His duty-oriented personality contrasts with Pent and Louise's eccentricity and recklessness though, as he is more concerned with the Reglay and Etruria political situation than his parents. He is very fond of his younger sister Clarine, but considers her young and inexperienced.
