He's Ernesti's friend and Ady's twin brother—pretty much the heart of their group. Most people would describe him as genuinely kind and laid-back, though he's got this streak where he can read a situation pretty well one moment and then do something totally reckless the next. He tends to be blunt about things, which some appreciate and others. well, don't.
What really defines him is how much he cares. He's protective of Adeltrud and fiercely loyal to his friends. He knows his limits though—he can be brave as hell when it counts, but he's also smart enough to back down when he needs to. Ernesti's basically his mentor, and he follows his lead more often than not.
He's made a name for himself as someone with serious guts. Standing up to Baltsar and actually beating him? That's the kind of thing that sticks with people. He relies on raw power as his go-to move in a fight, which works for him. That said, he's not helpless with technique either—he's just not in the same league as Eru or Ady when it comes to that kind of precision and skill.
Content compiled by AnimeList.moe from publicly available sources.