Trinity lives in New York City. It's where they were born, and where they returned after they were discharged. They stay there because it has good sightlines, as well as plenty of targets that both match their stipulations, and pay well to take care of. They do sometimes travel for work, but the majority of it is here.
Their condo is sparsely furnished, and has a private parking spot under the building. It also has a panic room. They bought out the condo across from them, so they own the whole floor. The second condo has more normal furnishing, and is sometimes used to entertain if needed, but otherwise ignored.
Trinity gets their money from performing killings for high prices. Generally, these are done at significant range with their silenced sniper rifle, but if contracts stipulate it or the need arises, they will do it in other ways. A majority of this money is invested back into their "business", including tools of the trade, their condo, their car, extra weapons, and networking. That last one is likely the most important one, and is why they are well known in the correct circles.
Any extra profit left over is donated to various rotating charities and non-profits, especially ones based in the middle east.
Trinity's ambition is to kill everyone that can claim more than a million dollars to their name. If pressed, one would find that they don't really have a good metric for figuring that out - property counts, sure, but what else? Liquid assets only? Do they just google someone's net worth? It's unclear. Realistically, they are starting with anyone they feel is "grossly rich" or has benefited greatly from war profiteering. To their credit, that second part is a lot more tangible and is well researched with their contacts before taking someone on as a target. They are obviously willing to kill for this goal, and more than happy to die for it - eventually.
After all, there is no place for people like them in the world they're hoping to build.
On September Eleventh, 2001, Trinity was ten years old. They were at school and their father was at work, at the World Trade Center. They had considered pretending to be sick and making their dad stay home to take care of them that morning, and regrets not having done so even now. After that day, they knew what the right thing to do was: Join the army, and help their country fight back against the increasing terrorist threat from Iraq and similar countries who wanted only to destroy their freedom. They held onto that belief until turning 18 and enlisting, eventually attaining the rank of Lance Corporal and joining the United States Marine Corps Scout Sniper School, earning their Scout Sniper designation.
One of Trinity's old friends is Luna Fox, a former Yakuza family enforcer released from service - she navigates Boston's underworld with ease, her network of contacts and street smarts proving invaluable to Trinity when working in that city. Whether it's procuring information, providing backup, or handling situations with a more direct approach, Luna is the woman to turn to when Lynk doesn't know what's what in that area.
Lynk is an information broker - Trinity hasn't ever seen them in person, but they get in contact via dark-web whenever anything stranger than normal is going on. For example, Lynk helped get ahold of Trinity's gun when she needed some new equipment - with Luna's help on the local scene, and some of her contacts jumping in.
Mathias Galligan is another hitman that Trinity has worked with in the past - He lives over in Oregon, and was her local contact in the area when she was hired to take out a rich man that had retired there.
Trinity had a perfectly normal and incredibly wonderful childhood. Both of her parents loved her very much growing up, and had plenty of money for anything she wanted. She did well at school - even getting into some advanced science programs as a kid, and had plenty of friends, at least up until her father died on 9/11 when she was ten, and her mother fell into a depression after that and took her own life a few years later when she was 16. By then, she had already realized she was the only one she could really rely on, and was working part time and exercising heavily to prepare to go to war for her country. She didn't really fit in with most of her peers, but there was a posse of other kids interested in joining the military that she hung out with on any free time she didn't spend training or working.
Trinity thought she was in love when she was in Scout Sniper school. There was a girl there who was doing just as well as her in all her trainings, and maybe even a little better sometimes. They practiced together often, and even started spending time together in their free time (such as it was) instead of only practicing. One day, she tried to kiss Trinity while they were both drunk, and Trinity let her - thinking it meant something. When she brought it up later, however, Trinity was met with the harsh reality that she had just been playing around, and that Trinity should have known better. They never spoke again.
Trinity's worst fear is that she'll be forced to kill for someone else again, instead of for herself. Ever since she came home and began to understand that she'd just been killing for oil barons this whole time, she has hated how good she is at it - but that won't stop her from using the skills she gained to get revenge. She's scared it will all have been for nothing, and she'll end up dead in a ditch with the fortune she's amassed going to some bank instead of to furthering her goals - since she has no immediate next of kin.
She's also afraid that even now, her goals are not pure. That even as she hunts those who have ruined so many lives, her real reason for doing it is that she just wants an excuse to keep killing since she came home, that she doesn't really care about what they've done as long as it can give her some excuse, any excuse, to put a bullet in someone's head. She wakes up sometimes and wonders if that day is the day that she will finally snap, and realize that none of it matters except the kill. But, if she's so afraid of that being the case, that can't be true, right? Right?
Trinity's most prized possession is definitely her gun. No contest. It's silenced, hide-able, and even changes the kind of gun it is according to her current needs. Not to mention it seems to hit harder than other guns she's used. Yes, the day she stole it with Luna's help is one of the greatest days of her life - sure, it seemed at first to make her angrier, and even put a hole in her hand when she chose to use it anyway, but that hole is healed now, and the anger? Well, it's aimed correctly, anyway. So that's nothing to really worry about. She just gets a perfect weapon for her needs, both in her normal life as a hitman and in her new "career" doing these contracts for supernatural favors which, more often than not, require a sudden appearance of a silenced and potent ranged weapon to tip the odds in her favor.
One of the biggest problems in Trinity's life right now is figuring out the right way to stay in touch with other contractors. She'll have to get a burner phone or something soon... So far, with a single exception, she has given out an encrypted address that can be accessed through a browser like Tor to get in touch with her. This is, of course, the method by which she receives her regular job postings, however. That line is now being sullied with 3AM poems about Yosemite and requests to go "big game hunting" - which, it turns out, meant moose. Not, as expected, powerful men with more money than morals. So, yeah. Perhaps a different burner phone for each contact, which can remotely link to encrypted servers online, and then those link back to a different, also encrypted online account with some sorting capability? She's going to have to talk to Lynk...
Trinity sleeps in a reinforced under-weave in case something goes wrong while she does so. She wakes exactly 20 minutes before sunrise every day, and is done with her cold shower - during which she brushes her teeth - and dressed with her suit and a cup of coffee by the time the sun rises, which she views from her window. As she watches it rise, she reminds herself why she does what she does - everyone deserves to be able to see that sunrise every day, not just those rich enough to afford the right view. After it rises, she has a full breakfast and scans her encrypted lines for any new jobs, or contacts from other contractors. Then she sets any necessary plans in motion for her to carry out any job she might have for that day, making sure Lynk is doing their end of the job as well, and then heads out for the day.
Trinity looks her best anywhere she goes - first impressions are important, and so are any subsequent impressions. She gets her jobs from word-of-mouth, and she needs anyone she meets that knows what she can do to take one look at her and understand who she is and how she does what she does. Any potential enemies should see her and know that the path of least resistance is just doing whatever she wants.
Which is to say, she would wear her reinforced suit and take her briefcase. The briefcase is always prepped, and it takes her only about twenty minutes to get on the suit after showering - it is always prepped and ready to go, after all. Since she's been able to remove the part of getting ready that involved checking her weapon's function and ensuring there were backup guns in different places, her time to leave has been significantly cut short.
Trinity doesn't celebrate her birthday. She does, however, make a point to make a few large charitable donations around that time, in her name, to keep up a social persona of "playboy millionaire philanthropist". It makes her actual job much easier, of course, but it also makes her feel better about her place in the world. There's many lives that have been bettered by her doing this, because she chooses charities for their actual impact dollar for dollar. She might be just a tool to accomplish an end, but she can do some good on the way there as well.
Trinity's greatest regret is all of the killing that she did for the wrong reasons, against targets that didn't deserve her rifle's kiss. She doesn't necessarily regret joining the military, as her training is serving her well now, but she regrets not getting out sooner. She regrets every pull of the trigger overseas that was at the behest of an oil baron lobbying for her and for people like her to kill in order to make more room for them in countries that deserve to keep their own resources instead of being forced at gunpoint to export them cheap to a country that deserves nothing except for what they've been dishing out for centuries. Rome fell quick enough, when the time came, and she regrets that it's taken this long for this empire to meet its destiny. Soon, she will guide it along to its afterlife as she has guided so many others.
Some of Trinity's gifts are just unlocking the potential that was already there - her training, the way she feels comfortable with any gun in her hand. She didn't notice those gifts at first - just like the gun she stole before this all started, she thought her training was just paying further dividends. Now, as the gun gets more powerful and as her training goes from "Good shot" to "How in the hell did you pull that shot off?" she has realized the truth. These contracts are pushing her further and further from reality and into a realm of superhuman skill. When she started being able to talk to the dead is when it really clicked though, of course. She's not human anymore. She's a god. A minor one, lowercase g, but a god nonetheless. What else to call the grim reaper? The ferryman?
Her and Charon are becoming more and more acquainted with each contract. Soon, Hades himself will answer to her.