The android character in the movie Aliens played by Lance Henriksen and definitely the coolest character in the movie apart from Ripley. Bishop is initially mistrusted by Ripley because he is an android and in Alien Ripley was betrayed by another android (Ash). But Bishop turns out to be good and Ripley relents. One of the best bits is when Bishop puts his hand on top of another character's and stabs the gaps between his fingers with a knife at superhuman speeds. Also Bishop appears to have an alien burst out of his chest like Kane in the first film but it is actually the Alien Queen stabbing him with her tail. Awesome film. Awesome character.
Bishop: Bishop is puzzled by Ripley's reaction towards him Is there a problem?
Burke: I'm sorry... I don't know why I even... Ripley's last trip out, the syn... the artificial person malfunctioned...
Burke: ...there were problems and a few deaths were involved.
Bishop: I'm shocked. Was it an older model?
Burke: The Hyperdine System's 120-A2.
Bishop: That explains it then. The A2s were always a bit twitchy. That could never happen now with our behavioral inhibitors. It is impossible for me to harm or by omission of action, allow to be harmed, a human being.