Little Dragon And His Boy

Ryuudamon is a canon Digimon, but not an X-Evolution canon native, so he's basically a new character. He is a young Digimon who is very eager to prove himself to the world as a hero. When he heard all about Dorumon's role in saving the Digital World from destruction, he decided to declare Dorumon as his ETERNAL RIVAL, long before he even meets him. And when they do meet, Dorumon is impressed by Ryuudamon's enthusiasm and determination but doesn't think of him as anything but a good friend. It frustrates him, but he volunteers to seek a human partner because saving the Digital World is heroic, isn't it?

His human partner is Kiuchi Haruki, who goes to school with Taku (though doesn't attend the same class) and is about the nicest guy you'll ever meet. He's calm and nearly impossible to upset, and he's very friendly and caring. He values fair play to the point where refuses to join his school's judo club, because he has been trained by his Olympic judo champion father since he was very small, and he thinks using his skills would be unfair to the other schools' teams. However, Haruki is quite critical of himself and doesn't think he's as good a person as he should be simply because he can't help everyone.