Hair: Medium brown, fading to darker brown (kind of a "gradient" XD), with little accents of dark brown here and there. Slightly curly and usually cut very short.

Eyes: Greenish-blue (bluish-green?) and fairly wide

Build: Big and strong! He has muscular arms and legs, no "six-pack" abs though, just a flat (a little bit soft) stomach.

Scars/Body Modifications/Other distinguishing features: His skin is very tanned and tough from all his time spent in the sun, with very noticeable tan lines underneath his clothes

Clothing: Outside of the army uniform he wears very "outdoors-y" clothes, khaki everything: (Shorts, pants, shirts, etc.), plain t-shirts or tank tops, and sometimes wears a hat

Disposition: Logan is adventurous and brash, fearing nothing and no one, sometimes to the point of reckless stupidity. Thought he's an extremely skilled outdoorsman and has VAST knowledge of the "right" way to do things he'll sometimes do needlessly risky things just for the thrill of it all (or to show off!) He seems to have endless energy and is always ready to go off and take on the world. He likes being around other people and talking, but his "people skills" aren't the greatest, partly from sometimes spending weeks without talking to a soul, and partly because he's...just kind of an arrogant, know-it-all dick. XD Though he takes orders well enough he's not the best at giving them, as he can be very impatient and condescending to those who don't learn fast enough. (But rude or not, he really knows what he's talking about, so one would do well to listen and TRY to learn from him!) He LOVES a challenge, dare him to do anything and he'll do it! All in all he's not really such a bad guy and means no one any harm, and other cocky, loudmouthed guys like him always find him fun to hang out with!

Mannerisms: He's smiling all the time, only showing other expressions when things are ROUGH. Talks a LOT, and especially loves to tell stories of the adventures he's had in his life, some of which are exaggerated. (He especially likes making up stories of "wrestling crocodiles" or "boxing kangaroos" when talking with American soldiers, they always eat that stuff up!) Others often find him intimidating as he speaks in a LOUD voice and is always cussing and shouting (he calls everyone and everything a "cunt", so try not to take it personally!) which gives the impression he's always angry, even though he rarely ever is. His sense of humor involves "just joking around" a lot, but others very often have a hard time being able to tell he's joking, leading to many misunderstandings (and occasional fights.) In addition to talking to others he talks to himself, animals, and inanimate objects all the time as well, and it's not unusual to see him off having an entire conversation with himself (also a product of having spent so much time alone in the past.) He's almost completely lacking in basic manners/etiquette (you're highly unlikely to hear any "please" or "thank you" out of him), and while he's not quite "feral" he sure is less civilized than the average person. Nothing seems to disgust him either, he'd do things like eat bugs or raw meat without a hesitation, or jump right into a stinking mud pit and wade across rather than find a way around it.

Voice: He has a thick Aussie accent ofc, and as mentioned, speaks loudly. His voice isn't especially deep, though it is a bit harsh and grating (especially when shouting), and sometimes gets quite hoarse.

Logan didn't have the best childhood, he and his father never got along very well (to put it mildly), and at the age of 14 he ran away from home, never looking back. It was just as well, all he ever wanted to do in life was explore the world around him, and this was his big chance! Though he had few possessions and little money to his name he did surprisingly well for himself, and never asked anyone for handouts, other than all the times he hitchhiked from place to place. He was essentially homeless for most of his teenage years, living out in the wilderness in a tent: learning to live off the land and survive the elements, eating some nasty things, and finding out the hard way what plants were poisonous. It got lonely at times, sometimes going weeks without human contact, but he was living life his way, and by his own rules. At 19 the loneliness began to get to him, and he finally moved into an actual house in a rural town with some like-minded friends he had met in the outback. At 20 he was conscripted into the army. 

Though he initially balked at the idea of taking orders and losing his freedom he ended up enjoying it more than he expected, and loved being able to show off his athleticism and take on any challenge thrown at him. After three years he was shipped off to Vietnam, thinking nothing of the war he was sent to fight in and instead was just excited to explore the jungle.