I like Ladd. Although he is a psycho who kills simply because he loves doing it, he still has a set of standards. Rather than fight Jacuzzi and co. when he mouthed-off to him, he knew that checking out the situation in the conductor's room took priority. Same thing when Lua, as soon as she camr into it, she took priority (ironic given their relationship). That scene where he contronted his boss and put a gun to his head was incredible: Even though he was just the sort of person he likes to kill, he still knew his boundaries, hell, he made a joke of it. Everyone knows that "HURR I KILL LOTS OF PEOPLE" =! GAR, so this is why he's earned my vote. Ladd is awesome. He's psychotic yes, but not a monster.
Also, voted Claire. Akagi-like + acrobatics, brick-shitting, Ladd vs. Claire finals, etc.