More like fitting it into just 3. Anyways, here's my profile; if I need to change anything, let me know.
Name: Vector Sledge.
Age: 21.
Occupation: Freelance technician/mechanical hardware designer.
Appearance:
Spoiler (click to show/hide):
3 things you have on you:
1- Prosthetic hand, with a "Revolver Punch" mechanism built in. A while back, Vector lost his left hand in a freak accident with an engine he was working on, and after getting it replaced with state-of-the-art prosthetics at the hospital, he decided to start tinkering with it as a makeshift weapon, should he ever need to defend himself.
This led to the development of what he calls "impact revolver" technology, the Revolver Punch mechanism being the first instance of it. A series of six magnetic charges are loaded into a revolver-esque chamber, and each charge can be "fired" during a punch, by passing an electrical current through the charge. When fired, that charge causes his fist to impact his foe as if he rammed a bowling ball into their gut. The depleted charge is then popped out of the prosthetics like an empty bullet casing.
2- 4 Impact Revolver charges. The charges themselves aren't that complex. They are simply metal cylinders with magnetic workings on the inside. If he needed to, Vector could craft more out of (for example) soda cans and compass magnets. The complexity lies in how he puts them together, not what materials they're made out of.
3- A self-crafted metal lunchbox, with a miniature canteen built into one side. The box itself isn't that big; its measurements are at 7" long by 5" wide (roughly 18 x 13 in cm), with 2" (~5 cm) of depth. It's large enough for him to fit some snacks into, though all he brought in it on the train was a bag of Skittles.
Personality:
Vector's a pretty calm and cool guy in terms of attitude, generally speaking. When making judgments on a situation, his thinking process tends to be quite analytical in nature.
Bio: Vector was on the train to reach a meeting with his next client before it crashed. They held a keen interest in his Impact Revolver innovations, and he wanted to see what they had in mind for him to work on. It's pretty much as simple as that...hey, a guy needs to make a living, does he not?