Claus is the older, energetic twin brother of [[Lucas (mother 3)|]] in [[Mother 3]]. He is characterized as being braver than his younger brother. An alternate costume for Lucas in [[Super Smash Bros.]] resembles him.

[spoiler]After [[Hinawa]]'s death, he goes off to try and kill the monster who did it, but dies in the process. He's resurrected as the [[Masked Man (mother 3)|]] by the Pigmask Army and has his memories suppressed. Lucas fights him as the final boss of the game.[/spoiler]
クラウス