This is Part 2 of the Percy x Sibling!Reader, so go check out before you read this one!
~Previously~
"CLOSE YOUR EYES!" I hear someone shout from outside, before an arrow comes and smashes the window.
~Now~
I quickly shielded my eyes with my arm to protect my eyes from the glass shards, and to heed the person's warning.
I hear snakes hissing from the direction that I last saw Aunty Em in.
"Ok, that hissing is louder... Wait..."
"Em, snakes hissing, very old seeming, charming..... No way..."
"Goddamnit... Where did she go?" I hear someone mutter.
"Hey, you ok? Sorry if the glass got in the way. My friend had her bow on her at the moment."
"Am I am able to look or..." I mumble off.
"Oh yeah, you can look around now, she went to the other room." The person responds.
I open my eyes to see a boy about my age, standing in front of me, looking for something.
"What are you looking for?" I ask him out of curiosity.
"Some sort of a mirror so we can see where she is, while not getting petrified." He answers.
"Here, take my phone," I say as I pull it out of my pocket.
"Thanks... Wait, so that's how they found you! You mind if I destroy this when we get out of this mess." The mystery man (who seems oddly familiar) questioned me.
"Uh... Sure?" I warily answered, wondering why he wanted to destroy my phone, and that's when I realized he had a sword in his hand. My immediate thought was to back away.
"Percy, you idiot! You're scaring them." A girl said while climbing through the window.
"Hm? Oh, that's my fault, we're not going to hurt you!" He reassures after taking a pen cap and placing it on the tip of the sword, making it shrink into a pen.
"I'm Percy, and this is Thaila. Nice to meet you!" He introduced them, pointing to Thalia when he said her name.
"Likewise, I'm Y/N. W-why are you here?" I question them, still scared. I mean, you would be too, if someone shot an old lady, broke a window, climbed through said window, and had a sword with them.
"We'll be able to explain in a bit. But for now, we gotta take care of her. You know who she is?" Thalia asks me.
"Medusa? But how is that possible? She's a Greek myth from hundreds of thousands of years ago!"
"Not a myth, again, we'll explain in a bit."
"So, Percy Jackson, you have returned. I have not forgiven you for what you did all those years ago." A voice echoes through the house.
"I didn't think so. If someone were to chop off my head, I wouldn't forgive them. Was it my fault though? You're the one who tried to turn me into a statue to fond over because my father left you after you turned into... that." He responds sarcastically.
(Persassy Jackson)
"Why you-" She was about to continue, but Percy finally spotted her, and with an arrow to the head, and a slash at the neck, her decapitated body turned to dust, and disappeared, while her head stayed where it was.
"Oh god, why is that still there?" I ask, freaked out.
"Prize of war or something. I knew that she was back when the head I had in my bedroom disappeared (dunno if that works like that, just gonna roll with it)."

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[ᴘʟᴜᴠɪᴏᴘʜɪʟᴇ] - ᴍᴜʟᴛɪꜰᴀɴᴅᴏᴍ
Fanfictionᴘʟᴜᴠɪᴏᴘʜɪʟᴇ (ɴ) ᴏɴᴇ ᴡʜᴏ ʟᴏᴠᴇꜱ ʀᴀɪɴ; ᴏɴᴇ ᴡʜᴏ ꜰɪɴᴅꜱ ᴊᴏʏ ᴀɴᴅ ᴘᴇᴀᴄᴇ ᴏꜰ ᴍɪɴᴅ ᴅᴜʀɪɴɢ ʀᴀɪɴʏ ᴅᴀʏꜱ ================ Multi-fandom oneshots :D Art not mine unless said is *No smut* REQUESTS OPEN (pride month related please)