There are quite a few, over two hundred, below her, and hundreds above her. They are spread out evenly on most floors, with a large mass on the ground floor, and few collected in various other pockets. 

The number of people in the building seems to be fluctuating. Up, up, down, up, down. There are new people filing in, killing and being killed by those on the ground floor.

Damn, a fight between humans is happening above her and she has no idea which side she's on.

She navigates up the tight stairway as quickly as is comfortable. Arms the smoke canister. She can 'see' through smoke, most folks can't. Tactics!

Her farsight - is actually kind of terrible for this, it has no fine resolution, so she decides she'll side with the defenders and minimizing bloodshed if possible. Is there a clear exit from this stairwell into the floor with most of the combat?

There is. She can simply follow it to the second highest level.

The invaders are presumably the heavily armed individuals coming into the room from three sides. 

The defenders are presumably the heavily armored folks wearing gas masks and vests, shooting tranquilizer darts and guns with about equal regularity. 

One of them spots her and shouts, "Loose elephant!"  

Trainquilizer darts fire her way.

"Do I look like I weigh five tons?"

The darts hit her shield. Nonlethal, these are the good guys (maybe). She'd just dodge, but ugh close quarters.

Lots of little balls of light start hitting the attackers and exploding just hard enough to disorient and blind. Well, probably. Nonlethal takedowns class was two and some years ago. She dodges about as much as the narrow room allows, maintaining the shield.

The ones with the guns ignore her and shoot the invading forces

The ones attacking her shout in confusion and fear, and stop shooting at her.

The invaders, on the other hand, start shooting at her with bullets.

That's what shields are for. Well, distance and speed are more effective at it, but shields are a good old standby. Colorful, too. Is she actually taking people out of the fight with the 'nonlethal light and sound blast' tactic or just wasting her mana?

Some of them drop their weapons, but some of them try shooting wildly into the air instead. The intruders, anyway.

The defenders return to tranquilizing the invaders but lay down their guns.

Let's remove the guns from as many goons as possible. Telekinesis. Maybe she'll break some bones if she does it too fast- But you can't dally in a fight. Bye bye, guns.

Goons are now shouting at each other, some of them backing out, trying to leave the building, and others are trying to push harder and faster, running for the stairs and the elevator.

Most of them are tranquilized.

Some of the non-goons begin to focus on her, keeping their tranquilizer guns helpfully and non-threateningly pointed at the ceiling and the floor. 

They begin to talk quietly, and one shouts, "Hey! Thanks for the help."

"Hello! Grendyne Nylund, UDF. I have no idea where I am. I got here by teleporter accident. You lot were the ones who were making any effort to be nonlethal. Now, I have a good touch heal and a mediocre area healing spell - anyone badly injured but still alive?"

There are some whispers about that, too.

One of them takes initiative and pings out the badly wounded, and a few of them carry them to her.

"Do you know if it works on the elephant? We've never heard of the UDF around these parts."

She touches them with one finger, one at a time.

Bullets leave their resting places and wounds close before their eyes. But not really all the way - 'Not currently bleeding to death' is the target until she know how much mana she can afford to spend.

"I do not know what the elephant is. Presumably some infectious disease, or toxic malady?"

This gives them pause.

"Discussing it in detail can be bad. You should meet the doctors."

Some of them begin to retreat, but others return to their posts.

The one who started bringing her the injured seems to have been selected as their point person.

"Follow me. The doctors will tell you about the fungus."

"That's not evasive at all. And you've never heard of the UDF?" She does follow once no more critically injured seem forthcoming, though, looking alert.

"No. Are you ex-military? We didn't think there was really much organization left outside the hospitals, after the elephant wiped us off the map."

He takes her down a narrow hallway to a door with a few curious people in lab coats who are staring at her, varingly pale.

"She's not infected," her companion says, exasperated.

"I'm current military. UDF stands for United Defense Force."

"Can't say we've heard of you yet. I'm the head physician at this hospital, and we're trying to contain a fungus that infects people's brains; when they reach the terminal point, their heads burst, releasing a pink cloud of spores. The pink elephant. The name wasn't my idea."

"...Hot damn, brain infection, that's scary. Well, I'm a Witch with the UDF and the UDF's goal is the preservation of mankind so I should try my heal on it. Though, the area heal is utter crap at diseases. Much better for trauma. The touch heal is good against malaria and worms, decent against tuberculosis, and all but useless on influenza. Don't know where a fungus will fall on that scale. You're the doctor, I just have magic."

"The disease is more typically fatal, if that's what it's checking for. Worth a try, I think. If I give you someone who contains a dormant version of the infection, will that suit? A person on a course of treatment with that as the end goal? Or someone recently infected, because those are, due to how quickly it kills, hard to come by."

"Any of the above. Preferably consenting, but if it's a brain infection..." She shudders. "I should probably know what you do to treat it, and more about the cycle. I get a little feedback from the magic, but not a lot."

"Of course. The fungus spreads by latching onto thoughts about it, and by drawing other thoughts towards itself. Its growth can be restricted by confining it to the parts of the brain that govern a patient's episodic memory and identity. Any personally identifying information destabilizes our treatment because it attracts the fungus, and can cause permanent brain damage, even if the treatment kicks in soon enough to prevent death. Recurring amnesia, essentially, though we prefer to avoid triggering memories so it doesn't happen more than once. Patients who are suited to life outside go there, with enough resources to last them at least until they can walk out of range of the local bandits, while the rest become doctors and guards."

"...So the idea is that recurring near total amnesia is better than death, essentially?"

"It is for humanity as a whole, which has been nearly destroyed. The people that result from this process may not be the same as the ones that start it- god knows I'm not, I hate the man I've read about in my file- but they are still people, who can lead full lives and let our species move on from this catastrophe."

"I am going to explore outside for a while. If people shoot at me and there is little sign of government, or if I get to talk to them and their story more or less matches yours, than I'll be much more inclined to believe you and help out when I come back. Because I really have difficulty expressing how incredibly sketchy this seems at first glance. That said, it's possible that my magic will interpret induced amnesia as trauma and fix it, which may be problematic. It's not especially precise, the person I got it from said it's caused problems like leaving bullets inside sealed wounds when she was new at using it."

"People will shoot at you eventually. The local bandits may have retreated further than usual, or be entirely incapacitated, depending on how many they sent in here for that little incursion."