As is pretty obvious, this is an account for Rinzler/Tron from the Tron movies (/comics/games). If you're looking for history or description or the like, you can skim some of my community applications. Short version: computer program, former protagonist, reprogrammed and used as a weapon for the majority of his existence.
There are a few things specific to my depiction—or at least worth clarifying. I generally take him from partway through Legacy, so unless someone's done some pretty thorough code-cleaning, he's going to have elements of both Rinzler and Tron's programming. I do not write him as a split personality character though. When he's Rinzler, he's just Tron, cut down to something Clu can use, with little left in the way of memory, morals, or freedom. When he's Tron, he's not completely separate or restored to some base state—he's Rinzler, with the memory of who he was, the capacity to care about what he's done, and the freedom to choose his own actions.
Other stuff. For height, I assume he's Tron-height (tall), but hunches enough as Rinzler to still look the midget-size he was in Legacy. Yes, I realize that should be impossible. As far as capabilities are concerned (apart from overwhelming badassery)... there's a list. Nearly all the canon stuff is in, though as Rinzler, he may or may not think to use some of it (disguise overlays, for instance). Given movie lines about disks and checkpoints, I also assume Rinzler's capable of reading another's disk—he can't get much from (or alter at all) the code, but he can review memory data. I also assume as a security program that he can scan others, though how much this will tell him varies greatly depending on the target. As Rinzler, he's under a number of restrictions and nasty mindscrews; some specific blocks are that he can't speak, take off the helmet, or view his own code.
Current continuities:
Six Word Stories:
Started as Rinzler, wound up in a fight with JARVIS (Marvel supercomputer, not Clu's suckup :P). Lost massively. Wound up mostly un-reprogrammed, has since been wandering around picking through what's left of Clu's code, trying to figure out what his purpose should be, and freaking out massively anytime anyone comes close to touching his disks. Oh, and plotting Clu's downfall. He's kind of focused on that.
As far as timeline goes, this one's kinda screwy. He theoretically hasn't warped universes or anything yet (though the Grid seems to have been more of an open system than people realized :P). He started off about at the Rectifier—he was hunting Sam, Quorra, and Flynn, and knows the End of Line blew up (again). But he hasn't experienced the last third of the movie. As far as he's concerned, Clu's still in charge of things. Basically, he's off in his own little AU. Feel free to go along with his version of reality or completely ignore it; he'll be confused, but that's nothing new.
Grid-Lined:
Rinzler got pulled by the Portal's malfunction from the exact moment mid-fight on the rectifier bridge—he was glitching, freezing up, about to get kicked off by Quorra, and all of a sudden he's landing on the city streets. Though he ran into a Clu shortly after (who gave him the entirely feasible task of enforcing order and capturing programs in this Grid), his admin failed to explain... well, anything. So far he's met one program (Ram) who tried to tell him he was somewhere/when else, and he wasn't entirely inclined to believe him. Basically he's been wandering around the Grid trying to find people to attack while ignoring the overwhelming number of mismatches between how things 'should' be and what he's seeing.
This wonderful state of confusion was heightened when Sam Flynn decided to revisit the Grid. Rinzler ran into him, disks were drawn, stabbery ensued. As Rinzler was still trying to work through the "stabbed a user" errors... Flynn showed up. And had the fairly predictable reaction of "what are you doing, program, give me my kid." Unfortunately, this managed to hit all of Rinzler's sadness buttons. Specifically those along the lines of "Flynn doesn't care about me/left me/ only cares about users/I am alone and unloved and broken." So he kind of headed off (with Sam's disk) in a sulk-hate.
No kind of repair has been made on him yet—either by Clu, to fix the increasing strain in the filters and restrictions he's under, or by anyone else, to fix the rectification. He's basically in a state where he's almost remembering things—but that triggers reprimand from his systems, so he keeps hurting himself every time he tries. The GL grid is full of people who will set him off: any of his not-rectified copies, any user he can identify as such, anyone he knew or might remember. Just seeing Tron, Flynn, or Alan will stress the repurposing; seeing Flynn or Alan in danger will break it. In short, unless some kind of code-patching occurs, Rinzler's got good odds of breaking down, and soon. What he'll end up as after that is entirely unknown.
Ilpromenade:
Rinzler woke up in a dream, and promptly hit the local network for info. Unfortunately, he failed to realize what the Teneka function was doing, and promptly broadcast a good deal of his confused/crazy thoughts to the whole city. Quorra was the first to respond, which made Rinzler happy—it gave him somewhere to start to complete his current directive: "Find them."
He promptly ran around chasing Quorra for a week. This has involved running into everyone ever, since Quorra inexplicably made friends in her 5 months in-city. Who don't like people trying to hunt her. Cue infinite series of battles, most of which involve Rinzler glitching whenever he scores a hit. He eventually caught up to her, cuing epic lightycle battle. Which is... what we're up to.
(dear_mun is outside of all continuities, since any and all versions of Tronzler I play need a place to rant)