This is a Harry Potter & NCIS LA crossover challenge.
Kensi is a witch, and hasn't seen Harry and Ron in a few years. They end up working on a case together. Oh, and Nell's magical too.

Kensi's POV:

"Hey Kensi, Hey Deeks." "Hey guys. How was the game?" "Not that good… we lost." "You mean we got creamed, G." Callen glares at his partner, I laugh. Eric whistles for us. We walk up to Ops. and Callen says his famous, "What've you got, Eric?" Eric pulls up a video from a traffic cam. Two guys are fighting, one ends up dead, and the other- whose face is covered- runs away. "We've got nothing on the killer, but…" "Dead guy is Thomas Greenfield (OC- made up name). House address is on your phones." "Deeks and Kensi, check out his house. Sam and I will take the crime scene." I stand staring at the screen for a minute more, "Kensi, you okay?" "Huh? Oh, yeah. I'll be fine." "Okay."

**Time jump**

We get to the house and start going up to it. "… cause I need to know that you'll be okay. I don't want my partner going all weird." "Deeks! For the last time, I'm fine. I was just thinking okay? Just drop it!" "Alright, sheesh." I try the door, it's open, "On three… One… Two… Three!" I open the door and we rush in. Nobody's in there, so we start looking around for anything that could help us. We're about ready to leave, when we hear the door open, and draw our weapons. Some people start coming in, "Federal Agents, put your hands out!" Three pairs of hands come around the corner, and then three people walk in. Deeks goes over the handcuff them, but I just freeze. He stops and turns around, "Kensi? You okay… I thought you said that you would be." One of the guys has been staring at me, when Deeks says my name, realization dawns on his face. "Kensi Blye?" "Yes, and who might you be?" He brushes back his bangs to reveal… a lightning bolt shaped scar!

Deek's POV:

Kensi starts to put down her gun, but then aims it back up a the black haired man. "What was the first thing I said about your invisibility cloak?" "Impossible! I thought it was a myth!" She nods, then aims her gun at the red head. "What did I tell you about the Slytherins singing Weasley is our King?" "Ignore it like I ignore my brothers." "Alright, then I can trust you two to know if he's alright." The black haired one turns to the brown haired one, "Kyle, how many times have I saved your life?" "Twice, Mr. Potter." Potter nods. Kensi smiles, puts her gun away, and hugs the red head and Potter. "Harry, Ron, what are you doing here?" "This is the house of Thomas Greenfield, right?" "Yes… is he…" she trails off. "Kensi, what's going on?" "Oh! Deeks, these are my friends, Ron Weasley and Harry Potter. You guys, this is my Partner and our LAPD Leason Marty Deeks." We shake hands and then Harry says, "This is Kyle Sands. He finished his training earlier this year. "And you've already saved him twice? Geez Harry, you going for a new record or something!?" The four of them laugh, clearly, I'm missing something. "But seriously Harry, Greenfield's a navy officer, you can't honestly tell me that he's one of us." "He isn't. We've been chasing down a guy who decides to come to the US. This is his first victim." "How do you know it was him?" "Having Kingsley as the MOM really helps." Kensi laughs again. "Okay, I'm clearly missing something here, what is it?" Kensi says she'll explain later. "My team doesn't know anything, doyou think we'll be able to work together?" "Not sure, I'll check." He pulls out this mirror. Now I'm pretty sure I can't get any more confused. "Kingsley Shacklebolt- Hello Harry- We have a little situation, sir. NCIS is here, dead guy's a marine, can we combine?- You're the head, you can decide- Yes sir, I understand that I'm head, but you're the Minister- Alright, Harry- Thank you sir- Can you send Sands back, though?- I'll do that sir. Thanks again." He turns back to us, "He's alright with it, but he's feel better if it's just Ron and I, sorry Kyle." "That's alright sir." Then he just disappears. I stare at Kensi. "Car's big enough for the four of us. I'll drive back to Ops, and then we can tell my team." She holds her hand out for the key, I give them to her. We ride in silence. When we get back, I see that Callen and Sam are back, too. "Find anything at his house?" "Nope, but we did find these guys." "Why are there others in Ops? That's what the Boatshed's for!" "They're going to help us." Callen looks behind us, "You better be thankful that Hetty's up in Ops, otherwise she'd be on you about this as well." "When we go up, she'll get me. Well, probably should just get this over with." She sighs as we walk up to Ops. "Miss Blye, I believe that I have very specific rules about others in Ops." "I know Hetty. These are two of my best friends, Ron Weasley and Harry Potter." Nell turns around, "Did you say Ron Weasley and Harry Potter?" "Yes Nell, she did." The two people look at each other and the red head nods. "May I ask you name, ma'am? I'm willing to bet that if you know us by our names, then you're one of us." "My name is Nell Jones. I'm not sure if you know of me since I'm a muggleborn, and I was in Hufflepuff." "I knew there was some reason that I recognized you when you were first here." "Two questions: 1) were you a friend of Diggory? 2) Were you part of the DA?" "Yes, Cho and I are very good friends, and yes, my patronus is a beaver." "What the heck is going on here!?"

Kensi's POV:

Harry and Ron tell part of their history, and then we all explain magic. After some demonstrations the rest of the team believes. I then ask Nell how she decided on this job instead of a magical one. She told me that her family wanted her closer to them. Oh, the irony of the job. I then told her that I had wanted to be an Auror so bad, but during the classes, I was board, so I took up this job, instead. My dad told me to follow my heart, so he wasn't mad me. Callen then pulls me aside, "Why didn't you ever tell us this?" "The Statue of Security, Callen; I couldn't tell you guys. I even had to get clearance to tell you now." "Did Hetty know?" "She knew about me, and seeing her unsurprised face; she knew about Nell as well." We walk back in the room with Callen saying, "Well, if you trust them." "Thanks, Callen." (I know that he doesn't trust very well.) We both brief the other team on our case, so we'll all be on the same page. Harry gets a call from Kyle that gives us the place that our suspect is, and rush there right away.