I need some advice if anyone can help me with it. I am at my wits end with this coworker, and I've talked with the assistant manager, who knows what's going on but before anything happens I'd like to have some advice on how to deal with this person. If anyone can help me anyway.

I work at a hardware store and have been there since March of this year [Home Depot if anyone was curious] as a cashier. I'm friendly with everyone, and do as I'm told when I know I can and if I don't then I ask for help.

So A month or two ago we got a new cashier in that had transferred from a different store. Yeah, different store new rules and all, but this person [we'll call her Karen for anon purposes] is the most entitled person on the planet I swear to god. She has problems with everyone [myself included] and today it got to the point where I had to have a talk with an assistant manager because I was going to have a mental breakdown if it happened again.

One time my head cashier [basically my boss in the cashiering section] told me to stay at self check out. So I stay at self check out after returning from a break and she sees me and immediately goes to where I am and leaves a customer in her lane. That is a big no no in our store, we're taught to never abandon our registers when there's a customer. Instead of taking care of the customer first she came over to self check out and basically demanded I went back to the register saying "go back to where you started" in the rudest way possible. I was pissed.

I normally would've let that go, but she left a customer for me to deal with when she could've done it herself.

Another time I was at self checkout again, and we have a new guy that transferred from across the country [I'm on the east coast of the US and he transferred from Nevada] and she was being demanding about how I was supposed to be on a register [they had literally just come back from their breaks within minutes of each other] and tried to get me in trouble when I apparently said no to hopping on a register.

One, there was no line at the pro registers [this is where all the contracters and builders go check out basically] and two I was going out to cashier in garden in like 30 minutes [at the time anyway] and three, I was helping out the new guy. The hell was I supposed to do? Leave him there confused if someone asked him a question that he didn't have an answer to? She called up the person who was manager on duty and tried to get me in trouble for not wanting to get on a register, and I wasn't going to when I was already going to go out to a different spot anyway. The manager on duty took my side on that one.

Yesterday was really pushing it. I was bringing up returns to the service desk, and had to bring something to recieving [basically where the trucks full of new stuff come in, if that makes sense] and she was at self check out while another cashier was at the pro side taking customers. He had a small line, [literally like 3 people with a bunch of stuff] and he had asked her to take a customer who had to measure something. She refused because she apparently doesn't know how to measure something? How the hell do you not know how to measure something? I was having trouble with the card reader over at the pro side so I was taking returns and cleaning up [taking out the trash, cleaning the registers etc. basically just doing end of the night stuff so that morning shift doesn't have anything to complain about] So she called my head cashier, the manager on duty, whoever she could get a hold of because she didn't want to take one customer? wtf. I had an excuse because my card reader was broken. WHAT WAS i SUPPOSED TO DO?! [There's two pro registers, and the one I was on had trouble reading cards with chips so I went to clean and let them take the customers for the rest of the night since it was close to closing time]

I took the customer he had left in his line and still had trouble so what could I do? shrug

My head cashier took me and the other coworker that was at pro and went to talk to the manager on duty about what was going on so she knows about it. Said manager on duty is the same one who Karen thought was a good idea to try to get me in trouble with so. Whatever

Today was a normal day. I had a great day until lunch. There was 4 of us going to lunch at 4 pm [Karen included] I had already sent one cashier to lunch early so that someone else could go after him that way we could fill in for the people leaving at 5 pm. So in comes new guy, I tell him to take care of garden's break and when he got back he got the manager on duty [she's in plumbing but we had no head cashier after 2 so she became our head cashier today] and we discussed who was going to lunch next. I suggested Karen and so the temp head cashier told me to go tell Karen. Karen snaps at me and says she doesn't want to go to lunch early. So I just walk back to the head cashier and told her what I was told and head cashier told me to go to lunch. I had a talk with manager on duty again [the same one who Karen tried to get me in trouble with] and she said she'd talk to the assistant manager.

Come close to closing time and I'm doing my usual cleaning and stuff. Turns out Karen has been talking behind my back, saying how lazy I am and etc. How is taking out trash being lazy again? I talk with head cashier and then manage to speak to the assistant manager and assistant manager gets story from new guy, basically telling assistant manager what Karen's saying behind my back.

And tomorrow we work together again. I already know it's not going to end well, but we'll see. Any other advice you can give me? I'm not a confrontational person at all. All I can do is just hope they put the both of us far away from each other but sigh. what can I do? Everyone keeps telling me to report it, so I'm already doing that but it's going to get to a breaking point and I don't want that.

Any advice is appreciated.