Heero is also highly skilled in computer hacking, piloting and fighting in combat situations. His lean build and young appearance give a false impression of his abilities. For someone his age, Heero is incredibly strong, fast and efficient. His early training allows him to be the 'ideal' soldier. Smart, strong and talented, Heero can definately be considered to be the most dangerous out of all the Gundam pilots.

However, Heero does have emotions and he is not as merciless as he appears. There are times where he tries to kill and is unable to bring himself to. Also, when he kills certain diplomats by mistake, he tries to rectify it. There are several examples throughout the series, ova and manga that show that Heero isn't quite the "perfect soldier" he appears to be. He is, in fact, almost innocent at times.

There seems to be a special relationship between him and Relena. At first, it seems to be onesided with infatuation on Relena's part but as the two grow and mature a little, a bond (of sorts) appears. Events such as certain episodes towards the end of the series and the Blind Target manga really show this.