koushiro izumi
A character in the anime and manga series Digimon Adventure and Digimon Adventure 02. He 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. Izzy lives with his adopted parents. When he initially found out that he was adopted, 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.In the English dub, Izzy often says "Prodigious!"
He is the bearer of the Crest of Knowledge. He is one of the core members of the DigiDestined in both seasons. He is voiced by Mona Marshall in the English version, Umi Tenjin in the Japanese version and Rodrigo Antas in Brazil.
He saw the battle between Parrotmon/Greymon, resulting in him becoming a DigiDestined. Izzy's real parents died in a car crash, and Izzy's adoptive parents were asked to take care of him. He heard he was adopted on a night when he couldn't sleep.
Izzy is the computer whiz of the group, and the 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. For instance, when his partner, Tentomon, hears about Izzy’s alien theory, he asks, "What mystery is there to me? I am who I am." When the DigiDestined enter a factory, Izzy finds a large battery and enters. He wipes away a part of the hieroglyphics on the inner wall, causing the factory to stop production. Izzy becomes the first to realize that everything, even the program, is living in the Digital World.
Source from here.