Henry is a very calm and levelheaded boy, much more mature than an average boy his age. Henry is a pacifist, and prefers not to fight if he can help it. This is because when he was a young boy and just started learning martial arts, he used his newfound skills to injure another boy, something he wasn't supposed to do and regrets deeply. As a Tamer, Henry understands that fighting is sometimes necessary, and learns to balance between good fights and bad ones, though he remains a very non-aggressive person. Though quiet and introverted, Henry is nevertheless a very amiable and approachable person, and is quite a good friend. He is very intelligent and a good strategist, and somewhat into computers.

Henry is the third child in his family, with an older brother, Rinchei, an older sister, Jaarin, and a younger sister, Suzie. Henry is half-Chinese and half-Japanese; his father (Janyu) is Chinese and his mother (Mayumi) is Japanese. Henry's father is one of the Monster Makers, the group that created Digimon.

Along with his father, Henry is a Tai Chi student, a fighting style he would later use in combat when biomerged with Terriermon into MegaGargomon, when facing destruction at the hand of the Digimon Sovereign Zhuqiaomon.