Author's Note : Kayden Herondale is 17, 6'2" with blue eyes and dirty blond swept back hair. Is Jace's half brother and lives with him in the New York Institute. His mom is Amatis Greymark.


New York City Streets

"Hey Alec where's this demon we're supposed to be interrogating?" I ask looking over at the boy.

"It should be just up here" I hear as we turn down an alleyway. I grab his arm and take out my stele to tell him we should mark up first. I roll up my sleeve and feel the familiar tingle of the marks. I look and see him drawing an Accuracy rune, a Strength rune, and a Sure-Striking rune on my arm.

"Why you know I'm just gonna use my swords" I saw drawing one to show him the gold edged blade. He just shrugs and pushes the stele into my hand. I sigh, before applying an accuracy rune on my partners arm. I fiddle with the straps on my chest before heading down the alleyway. I take out a seraph blade and whisper, "Ithuriel". The weapon blazes to life lighting the area as a pile of boxes is shoved on top of me. I throw the blade through a gap in the boxes and shove them out of my way. Sprinting now, I follow a person out of the alley only to be stopped instanly by Maryse Lightwood.

"What are you doing Alec?" She asks ignoring me. I look around her trying to see the person I was chasing. I'm vaguely aware of Alec and his mother arguing as I search the crowded streets.

"You fucked it up! We could've had him and you got in my damn way!" I yell at the woman.

"Your mother will be told if you keep up this incessant behavior." is all she says to me before dragging me and Alec back through the streets to the Institute. I look at Alec and he instantly knows we're going to find him later.

New York City, Club Pandemonium 3 Hours Later

I watch as Isabelle draws the target into the service room. " These fucking things" I think as I grab the handles of my twin swords Astraeus and Eos (Dusk and Dawn). I'm vaguely aware of Isabelle talking to the blue haired boy as I take my stele and draw a quick Sure-Striking rune on my arms. By the time I'm done Isabelle has tied up the demon with her whip.

"He's all yours boys." she says as Alec and Jace step into view. I grab his arms and throw him against a pillar as Jace asks the questions.

"Are there more of you here?" he asks the stubborn demon.

"Any more what?" the demon counters causing Jace to become super sarcastic.

"Any more demons, denizens of hell,servants, of Satan.." He begins as Isabelle cuts him off. The demon still refuses to talk. Getting more and more annoyed I draw one of my swords.

"Listen up, tell us if there's more of you here or I swear by the Angel I will cut your throat." I say stalking towards the captured being.

"Stop!" A small redhaired girl cries as she steps out from behind a pillar. She moves between the creature and us. I jump nearly dropping my sword and register the sound of a blade hitting the ground.

"What is this?" Alec asks looking at us.

"Some girl." I respond.

"But she can see us." Jace says.

"Duh, I'm not blind." Clary says.

"But you are, now get out of here if you know whats good for you." Jace threatens

I tighten my grip on my blade as I begin getting mad again.

"Either fucking kill her or knock her out so we can get this over with!" I yell as I grab a pipe off the ground. Isabelle steps in front of me grabbing my arm.

"Kayden, calm down and drop the pipe." she says calming me almost instantly. I oblige as I feel my Parabati mark pulse. During my outburst the demon got free lunging towards Jace. I watch as the random girl falls down and my brother is thrown to the ground. I grab a wire off the floor and stand behind the demon strangling it. Isabelle stomps over slashing her whip across the monsters stomach. It writhed making me lose my grip long enough for it to twist and start slashing my face. I hold it off until Jace stabs it in the back with his knife.

"Stupid mundane, you could've gotten us all killed." Isabelle snarls as her whips ensnares the other girls hand.

"Izzy let her go even if she called the police or something they would need a body." I say as Alec takes the whip out of her hand. "Besides we have to be careful if she can already see us." I finish.

"Clary?" a voice calls, "Are you okay? What happened to the guys with knives?" a nerdy looking boy asks. Her eyes flickered between us and her friend and bodyguard as we stood there covered in blood.

"It was a mistake they didn't come in here." she says finally as she leads them away.