Claus

Claus is a boy living in Tazmily Village, appearing in Mother 3. He is very active and talkative, a sharp contrast to his twin brother Lucas. He is also known for being mischievous and the cause of minor troubles for the townspeople.

In Mother 3
Claus first appears in the prologue, visiting his grandfather at Mt. Oriander. He loves playing with the Drago family, and spent most of his time on his visit playing outside and exploring. In Chapter 1, however, he's yet to return home from his visit because the forest ends up on fire, and there are many dangerous animals agitated. His mother is killed by one of these reconstructed animals, the Mecha-Drago, and seeks revenge after being found and rescued by the Tazmily townsfolk.

He tells only Lucas about his plan to take revenge against the Mecha-Drago for killing his mother, and steals his father's homemade knife to fight it. When Flint is put in jail for injuring a few of the villagers, Claus lets him out by concealing a nail file in an apple for him to break the lock with. Claus then heads off to the mountains, meeting the Magypsies on the way there and learning of his psychic abilities. He finds the Mecha-Drago, and gets at least severely injured in the fight. He then went missing, and none of the townsfolk know of what happened to him. Flint spends the next three years searching for him in the mountains, to no avail.

Trivia

 * One of Lucas's alternate outfits in Super Smash Bros. Brawl makes him resemble Claus, having red hair and wearing the same shirt and shorts.
 * Claus and Lucas's names are anagrams of each other.