I got a little carried away but here you go....

Name: Jane M. Shepard

Class: Soldier
Bio:
Shepard was born on April 11, 2154, and is a graduate of the Systems Alliance N7 special forces program (service no. 5923-AC-2826), a veteran of the Skyllian Blitz, and is initially assigned to the SSV Normandy in 2183 as Executive Officer. Shepard later becomes the first human to join the Spectres, an elite special task force for the Citadel Council.

Both of her parents were in the Alliance military, her childhood was spent on ships and stations as they transferred from posting to posting, never staying in one location for more than a few years. Following in her parents' footsteps, she enlisted at the age of eighteen.

Early in her military career she found herself facing an overwhelming enemy force. Shepard risked her own life to save her fellow soldiers and defeat the enemy despite the impossible odds. Her bravery and heroism have earned Shepard medals and recognition from the Alliance fleet. Shepard almost single-handedly repelled an attack by batarian slavers on Elysium. After Shepard’s reported death in xxxx a monument was constructed to honor the hero of Elysium, proceeds from the memorial going to the Shepard Foundation, a charity for Alliance Veterans also named after the Spectre.

Shepard’s first assignment as a Spectre was to track down rogue Spectre Saren Arterius. The chase across the galaxy culminated in an attack on the Citadel by a Reaper, a race of sentient machine intent on wiping out intelligent life in the Galaxy. ¾ of the Alliance fleets were wiped out during the attack on Soverign, the Reaper Saren was working for, as the Commander gave the order to assist the Destiny Ascension and rescue the Citadel Council, later naming Ambassador Udina as a candidate for humanity’s new slot on the council.

After the attack on the Citadel, the Alliance sent Shepard to root out any remaining geth resistance. The Normandy was sent into a sector where three ships were reported to have gone missing in the space of one month. After four days of fruitlessly searching for signs of geth activity, the Normandy is attacked by an unidentified ship, ripping it apart.
As the rest of the crew abandoned ship, Shepard went to rescue Joker, who refused the initial evacuation order believing he could still save the ship. Unfortunately, a blast separated them just as Shepard managed to get Joker into an escape pod. The Commander's hardsuit was damaged by explosions and Shepard was flung into space, barely surviving the Normandy's destruction. However, the suit's pressure seals were compromised, and it is apparent that the Commander suffocated to death, coupled with the possibility of the hardsuit burning up on reentry to the planet below.

In an effort undertaken by Cerberus called the Lazarus Project, Shepard is rebuilt and revived, organically and synthetically. Two years later, Shepard awakens in the lab of a Cerberus space station, which is under attack. As Shepard moves through the station, the Commander begins to learn about Project Lazarus and the effort taken to bring Shepard back—with many data caches citing the immense expense of the project and that despite their efforts to make the Commander exactly as before, Shepard may have been inadvertently altered in some way. Shepard has also been referred to as "asleep" for some time by the Illusive Man, leader of Cerberus.

All the while, the entire populations of human colonies have been disappearing without a trace during the Commander's incapacitation. Due to the ignorance and political red tape hampering both the Alliance and the Council, Cerberus is the only organization in a position to combat the threat, and Shepard agrees to work with Cerberus to solve this mystery. Meanwhile, rumors of Shepard's apparent survival have mixed concerns. Some would even think that Shepard is undercover investigating the colony disappearances. Shepard assembles a new team with some old friends and discovers the colonists are being abducted by Collectors – EDI determines after some analysis that the Collectors were once Prothean but were repurposed by the Reapers. Shepard destroys the Collector base and turns herself and the Normandy over to Alliance authorities.

The Commander is on Earth and is placed under arrest, waiting to be tried for causing the destruction of the Bahak system and its 300,000 batarian colonists. Six months later, the Reapers launch an assault on Earth, having found an alternate means of entering the galaxy. Shepard and David Anderson escape to the Alliance-refitted Normandy SR-2, where Anderson recommissions and charges Shepard with finding help while he stays behind to lead the resistance

As the Normandy lifts off, Shepard spots a young boy who previously refused help, climb into a departing shuttle, only for it to be shot down by a Reaper Destroyer. Shepard continues to have recurring dreams of the child, seeing him becoming consumed by flames before the Commander can reach him. In one such dream, Shepard sees the boy run up to another version of themselves, before both of them are consumed by the fire.
Shepard then begins trying to recruit the different races of the galaxy, both to fight the Reapers, and build a super weapon known simply as the Crucible, the schematics for which were discovered by Dr. Liara T'Soni in the Prothean Archives on Mars. Unfortunately, the Illusive Man seeks to oppose the Commander's efforts while trying to find a way to control the Reapers.

During the final battle for Earth, Shepard is gravely wounded in an attack by Harbinger. After reaching the Citadel and dealing with the Illusive Man, Shepard is greeted by the Catalyst - an ancient A.I. that controls the Reapers. The Catalyst explains to Shepard the purpose of the Reapers and their cycle of destruction, and then states that Shepard has up to four options for ending the cycle:
1.Destroy the Reapers: Shepard need only shoot a key energy tube, causing a massive explosion. Using the mass relays, the energy fired by the Crucible would destroy all synthetics across the galaxy, including the Reapers, EDI, the geth and possibly the Commander as well.
2.Control the Reapers: Shepard would grab hold of two electrical handles, which slowly disintegrate the Commander's body. Using the mass relays, the energy fired by the Crucible would upload Shepard's mind as the new Reaper master consciousness. The Reapers would depart Earth, the mass relays would be damaged by the Crucible firing, and the Citadel remain intact. The Reapers would help rebuild the galaxy, including the mass relays, and the new Shepard A.I. would vow to protect "the many" – though its manner of carrying out this duty is affected by whether Shepard's Morality was more Paragon or more Renegade.
3.Synthesis: Shepard would jump into the Crucible's energy beam, which absorbs and dissolves the Commander. Using the mass relays, the energy fired by the Crucible would transform all life in the galaxy into a new hybrid of synthetic-organic life (with all individuals developing green-highlighted skin and glowing eyes). The Reapers would depart Earth, and both the mass relays and the Citadel would be damaged by the Crucible firing. The Reapers would work together with everyone to rebuild the galaxy, including the mass relays, and share the knowledge of previously-harvested civilizations.
4.Refusal: Shepard could refuse to choose any of the three possible options or shoots the Catalyst. The Catalyst would shut down the Crucible and leaving it unable to fire. The Reapers would succeed in harvesting all advanced organic life throughout the galaxy, allowing the cycle to continue.

Shepard, suspecting that she might be indoctrinated like she believed the Illusive Man to be opts for the destroy option, believing that other civilizations would not have built a weapon purposefully to destroy all synthetics, only the Reaper threat.