Klein is one of the friendliest people.He never holds grudges against others and is always ready to lend a helping hand. He cares deeply for his friends and always wants to be by their side fighting alongside them when they are in danger.He gets angry when people get into situations that can get them killed since he wants to protect as many people as he can.Klein is a very loyal person.Klein is also a "bachelor" and is shown flirting with various women, trying to find 'the one' for him.