"It's useless, it's all useless!!" 
The son of Rudolf and his first wife, Asumu. But since Asumu died, Rudlpha quickly moved on and found a second wife in Kyrie... This upset Battler, so he went to live with his grandparents for a bit.
Because of his, he's not attended the family conference in six years...
Aside from that, Battler is a pretty chill dude, though... maybe he could tone it down on the simping....