Koushiro 'Izzy' Izumi

Izzy is partnered with Tentomon... Izzy is a computer expert and spends a large fraction of his time trying to figure stuff out on his "PiBook" laptop... He played on the soccer team with Sora Takenouchi and Taichi "Tai" Kamiya... Izzy lives with his adopted parents... When he initially found out, he began to subconsciously distant himself from his parents and focusing on his computer... The issue is resolved when his parents come forward with the truth and he accepts them as his true parents...He is the bearer of the Crest of Knowledge. He is one of the core members of the DigiDestined in both seasons. His color is purple and element is electricity... Izzy is the computer whiz of the group, most curious of the Digital World... He often prefers to be alone... Once in the Digital World, Izzy develops an "alien theory" and has a low opinion of the Digimon... Izzy becomes the first to realize that everything, even the program, is living in the Digital World... his skills with the computer, however, soon prove to be extraordinarily useful for the group... During this saga, Izzy’s parents reveal to him that he was adopted. Izzy’s real parents were killed in a car accident, and his father’s distant cousin adopted Izzy... Izzy’s computer becomes a more valued asset as the DigiDestined battle the Dark Masters. Before, their Digimon partners used to describe the information about the various Digimon that they encountered; now, Izzy has loaded a database of Digimon profiles. When a new Digimon shows up, Izzy names and describes the characteristics to the rest of the DigiDestined...

Four years later, Izzy is now in high school and was a president of the Computer Club. Izzy continues to play his technical role; he monitors the Digital World and alerts the new DigiDestined to upcoming troubles and problems...
With Willis from America, he also figures out that the new Digivices have three new functions, and dubs them the D-3s. Lastly, after school gets out, Izzy theorizes that the power of the D-3 is what really opens the gate to the Digital World. This theory proves to be correct, and gives the DigiDestined the ability to open up ports at any time and any location, rather than being limited to simply using the school’s computer lab to move in and out of the Digital World.

By the year 2027, Izzy sets up a research team to study more of the Digital World than what the human population already knows. He has a daughter, with a Motimon, but her mother is not revealed...