Impmon

Initially Impmon hates humans, and hates any Digimon with a tamer, although Renamon implies that he is jealous because he watches the tamers all the time. He nearly becomes friends with them, but in the end his desire for power gets the better of him and he becomes a more serious evil when he sells his soul to Caturamon and become Beelzemon. He displays an extreme lust for power when he destroys and absorbs the data of not only Leomon, but his own teammate Makuramon, as well as the ultimate forms of Terriermon and Renamon, and absorbs his master Caturamon's data when Gallantmon destroys him, calling him a "filthy dog". At this point he displays no remorse for his actions and declares his intention to absorb the Sovereign themselves.