Yuuta is a very young Daiyamondo boy. (He's like 14/15 years old now) When he was a puppy, he got seperated from his parents. Humans found him in his wolf-shape. Because of his 'speciel look', they sold him to a rich family with 3 kids. He was growing very fast so the family noticed, that he's not a normal dog with two tails (they thought he's disabled or something) so they were sure he would be a wolf-hybrid.
Often they were throwing sandals after him or hitting him with them, when he did something "wrong", especially when their baby cried, because they thought it was his fault. That's why he hates when people taking sandals or shoes in their hand, also screaming babie's, so he will go or run away instantly.
Of course he continued growing and in one night, he had killed almost all the rabbit's they had in a rabbit hutch so they put him in an Animal Shelter, where he would get killed. But he managed to run away. He didn't know where he should live, since he was all alone in this big world, so he tried to live near humans as a human being.

Despite the fact that he's feeling lonely all the time, he doesn't want to have that much contact with humans or dog's, often he's very respectless and bold to keep distance to them. He likes to provoke dog's when he feels superior, especially to very obedient dogs.

On the outskirts at the border to a wide plain with forests he has is little territory. There's an old couple living there. They were trying to feed him but he refused, so they decided to "lose" some food over the time, to feed him like this instead. Because he gets food there all the time, he is protecting their garden and their house.
When he see's or smells a certain kind of dried dog food or Dog-Treats, he'y buying them, when he has enough money or is stealing them from bowls for dogs outside from stores to eat them like they were Chips. (He loves it crunchy)

Even if he don't want to have that much contact to others, he is really lonely and is secretly searching for another Daiyamondo's when he's going trough town or the woods. He desperately hopes that he's not the only one who's like him.