Awesome Ego: Lupin has an extremely high opinion about himself both before and after death. This was due to his awesome skill as a thief being able to stealing whatever he wanted and being able to bed any woman (Minus Fujiko) at any time he wanted. Yet despite his ego, he never truly let it go to his head and always considered possibilities that would end in failure. And while he's subtle about boasting how awesome he is, Lupin does not try to hide his high opinion about himself either.
Badass Decay: Zenigata's still a badass, but he's not as strong/quick as he used to be. Proven when he gets hit by attacks from the Kuken that he would have dodged if he were younger.
Chaotic Neutral: Lupin is a mixture of types. He loves causing chaos as long as it doesn't threaten innocents. Can and will work with anyone to achieve his goals which don't lie with good or evil (the fact that good happens more often than not is a perk rather than a requirement).