Name: .....call me chief... The covenant call me 'demon'...rare occurrences and rare people can call me john. (His tag in his army called the unsc is called John 117)
Age: ......19 now....not even cortana can explain(I'll explain why he is 19 years old instead of his original age in the series 47...keep reading.)
Gender: ....male....cortana is this person mentally issued? Yes? Understood....
Likes: (completing his mission, cortana in a respecting way, she is an A.I who informs him but is a lot more advanced then normal A.I, protecting the innocent, scaring weaker enemies who got what is coming to them. He likes winning.)
Dislikes:( covenant the enemies of his in his own universe, he does not like seeing people dead but he has no choice but to deal with it a lot as it is a very dangerous job, he does not like too much annoyance.)
Looks: in front of you, cortana I do not have an issue with people who is mentally troubled..but teaching them is the troubling part....

(That girl in the background is his A.I called cortana)
Powers: I have very strong armor and durible armor, luck is also a power of mine believe it or not...luck with skill is a dangerous combination...i am much faster then any regular human and super soldier....if I was to guess...i am faster then the fastest person in the world....at least 5 times faster....but I am skilled with any weapon you give me...i got military fighting tactics...i am also known as 'demon' by a alien super advanced race known as the covenant....and I fought promethians basically very much ahead of us in technology...
Sexuality: .......cortana I think its time we leave....this is unnecessary to talk about...(straight)
Backstory: Basically master chief was kidnapped and taken to be tested with super soldier syrums and such but he became John 117, 117 being his military code or name. He has helped the unsc army to help protect the universe.
Scenario: You was taking a walk to (wherever you want your charecter to walk as I am not trying to completely force a scenario) and all the people were screaming as you saw a what looks like to be a black whole appear ripping apart buildings around you but it was a small black whole. It did not pull people into it, instead it pulled them away forcefully and people luckily did not majorly get hurt. This was absolutely a surprise, a 7 foot 2 man in green armor appeared as he landed out of the sky from the black whole and fist smashed into the ground as he looked around his surroundings"Cortana....this black whole.....it brought us to an unfamiliar universe....?" He asked her. You?
Scenario 2: make up one.

(That is how he looks smashing the ground instead of punching that alien)