I have never seen a friendship fic for this two, so here is a Katie/Thalia friendship fic.
Thalia's PoV
With the gods having their multiple personality disorder, Artemis has sent us to camp. So here I was, sitting with my girls, when a note appeared in the sacrafical altar.
When no one got up it to get I sighed, and marched up to the altar, all eyes on me.
I saw that it was from Annabeth and open it up.
I quickly scanned it, saw Reyna, Aranche, Athena Parthenos, and Tartarus. Wait Tartarus, I reread that line and saw what she had written: After I had found the statue, the seven and Nico appeared. I hadn't realized that the web around my foot was still attached to Aranche. Suddenly I was pulled over the edge, Percy jumped over and grabbed my wrist with one hand, and a ledge about 15 feet down. Nico tried to reach us, but couldn't. Percy made Nico agree to led the rest of the seven to the mortal side of the doors of death. Percy and I pulmetted down to Tartarus. This letter is coming from Tartarus.
I gasped. They were in Tartarus, Chiron looked at me expectantly. I threw tthe letter at him, and ran out off the pavlion to hide my tears. No one followed me, but everyone knew it must be bad if I stormed out of the pavilion.
I went into the Zeus cabin, because at least in there no one could follow me. I went to the alcove where I used to sleep. I started looking through the pictures that I left there and the pictures Jason added.
There were pictures of Annabeth, Percy, Luke, Piper, Leo, and a few others. I started to sob more.
A few minutes later there was a knock on my door. I ignored it, but the knocking became more persistent.
Finally I gave in and opened the door to see Katie Gardner standing there.
"What?" I asked, not so nicely.
"I just wanted to make sure you were ok, Chiron wouldn't tell us what the letter was about, but he looked said, and you stormed off, so it must be bad. But that is not why I am here. I am here to make sure you are okay, you looked pretty troubled back there."
"You'd be like this if your best friend and her boyfriend are - nevermind." I snapped, and then sighed and gave up.
"Thalia, was that from Annabeth?" Katie asked me. I just nodded not trusting my mouth.
"That bad, huh?" She asked.
"Come in, and I'll do my best to explain to you." I finally say, pulling her into my cabin.
"Okay," I say once she is next to me, "that letter, came from Tartarus."
"Where monsters go?" She asked, I nodded.
"Oh gods." She said.
"Yeah, apparently, Annabeth and Percy are-" And I started crying.
"down there?" She finished, asking me, with a face coneying a mixture of anger, confusion, and most of all sadness.
I nodded.
"Oh, Thalia. They will make it though, they are Percy and Annabeth." She said, attempting to cheer me.
"Katie," I said, "this is monster homecourt."
"Thalia, Percy led an army, I am pretty sure Percy and Annabeth will make it." She said, pulling her dirty blonde hair behind her ears.
"I guess you are right. Come on, we need to talk to Chiron. Oh, and Katie, hove you ever considered joining the hunters?" I asked, and she laughed.