Ianto
Jason's part of Torchwood 4, and a bomb tech. I think being slightly on the less than sane side comes with the job.
And yes, I am afraid of the drunken Irishman. I'm also afraid of Karrin kicking my ass if we try to control her life more than we already do.
Have you see that woman in action? She's a little scary. This is also why I don't date girls.
Speaking of our little psycho in the basement, did you see the new bombs he's developed for Vincent's guns? They're explosive rounds that only blow up when they hit the appropriate target. He's also developed a detonation button for a different type of round. Remote controlled.
You shoot the target, and when you're satisfied, you push the button the gun, and boom. The bullets that have been fired explode.