Sin hates birthdays. There is a reason for this, she doesn't know how old she really this. For those of you who don't know, in the comics, Red Skull used this machine to age up Sin. It's implied that she was de-aged and aged up more than once.
She loves trying out new weapons, to the point where she's a beta tester for any new weaponry.
She prefers to scare and threaten people into submission instead of beating the crap out of them... That's her boyfriend's job.
