Izzy, Malia and Lydia took the gurney with the dead body inside. "Take him down to the morgue. And call as soon as you identify what kind of demon we're looking for. Until Victor comes back from the trial, I'm running point on this one." Lydia explained, before her eyes darted to Malia. "Please, keep a low profile. Victor already highly dislikes you." She said. Malia gave a nod.

Izzy pushed the button for the elevator, but quickly held up Lydia who was about to walk away. "Lydia... Have you heard anything about Jace?" She asked. "I know you're worried, but I'm still waiting, just like you." Lydia sighed. "Except I'm the one who put him there. If I didn't make that deal with Aldertree–" Isabelle was cut off as Malia piped up, "Jace would've been torn apart by wolves, and Alec would be dead."

Lydia nodded, "She's right. You did what you had to do."

The girls push the gurney out of the elevator, as Raj walked by. "Wow, that guy's heart is obliterated. And I thought I was having a rough weekend." He spoke. "Show some respect for the dead." Lydia growled.

"I'm just saying, I've been in his shoes before. Except my demon's name was Kathy." Raj replied, as Malia narrowed her eyes at him, "You know, you might wanna cut back on the smartass remarks after getting manhandled by a warlock." She said, with a devious smile as Raj seemed embarrassed, before he walked away. Lydia giggled before she looked to Isabelle and Malia. "Let me know if you find anything." She said, before walking away.

"She's cute." Malia stated, as Isabelle laughed, "Where were you a couple weeks ago when she was trying to marry my brother?" She asked. Malia shrugged, "I was lost somewhere on Earth wrecking havoc." She responded, casually.

What the girls didn't notice, was that a cloud of black smoke left the corpse and went into a pipe.

☠︎︎

The alarm blared loudly, causing Madi, Clary, Lydia, Alec, Izzy and Malia to run into the training room. They stop in shock, finding Welkie dead.

"Oh, my God, Welkie!" Clary blurted, as Madi's eyes darted to another guy, who was sitting against the wall, shocked. "What happened?" He asked.

"Classic possession hangover." Madi stated, shocked. "Hole punched right through his chest." Malia added, looking down at Welkie's body. "Just like our mundane in the morgue." Izzy said to Malia.

Alec knelt down by the victim before sighing. "The demon's in the Institute."

Moments later, Lydia announced, "Activate emergency surveillance. Victor's unreachable. I've ordered the Institute be put on quarantine until we kill this thing."

With that, everyone grabbed their weapons. "What is that warlock doing here?" Somebody asked, pointing to Malia. Isabelle growled, before she grabbed Malia's hand. "This is my emotional support warlock. If you don't like that she is here, I suggest you leave." The Lightwood ordered as Malia tried to hold back a giggle.

Madi sighed, "Don't actually... I mean you can't, anyway. Malia won't cause any harm." She said to the other shadowhunter, who still didn't seem happy about the Bane girl's presence.

"I don't get it. How did the demon get past the wards?" Clary suddenly piped up, as the attention moved away from Malia now. "Same way it got in without setting off this." Isabelle replied, holding up her ruby necklace. "It must have some advanced cloaking ability. It hid in that dead body and let us do the rest."

"I didn't know demons could do that." Clary blurted. "Until now, they couldn't." Madeline stated before Alec spoke up, "This new form of possession, cloaking ability, targeting the Institute, it's..."

"Valentine. His experiments. My mom told me how he was determined to create a super-being that could defeat the Clave. It's what he tried to do with Jace." Clary explained, as Malia looked to her crush, with worry. "Both victims had damage to the prefrontal cortex. The demon must be feeding on negative emotions. Anger, hate, rage. Causing the host to violently act on those urges." Isabelle explained to everyone.

"So we continue to scan for venom and heat signatures. Try and narrow down the host before it strikes again." Alec announced, as Lydia pulled up a hologram of the Institute. "Alec, you check the living quarters. Izzy and Clary, you two take the utility tunnels. Madi, you check the weapons room.. take Malia with you." The Branwell ordered.

Madi and Malia shared a glance, before Malia let go of Isabelle's hand and walked over to Madi. "Let's go, Lightwood." The warlock said, as Madi gave a nod.

"Malia." Clary quickly piped up, as the ravenette turned to her quickly. "Be careful." Clary said, worry in her eyes. Malia smiled back nervously, "You too, sweetheart."

☠︎︎

Sometime later

"Found anything suspicious?" Madi asked, before she turned to face Malia who'd been awfully quiet. "..Bane??" The Lightwood asked.

Malia suddenly turned around, her eyes blackened over. "No. But I have found a pest." She answered darkly, as Madi's eyes widened, "You're possessed." She blurted, reaching for her pistol.

"Perhaps." Malia answered, raising her hand. She lifted Madeline off of the ground with her magic, and tightened a grip around her throat. "Malia.. please... this isn't you." Madi managed to choke out, feeling her limbs begin to tingle due to the lack of oxygen. "You don't know the real me. And you'll never get the chance to!" Malia snapped, before Madeline's body fell to the floor, as she fell unconscious.

A cloud of black smoke exited Malia's body and entered a vent. The warlock then blinked in surprise, confused to where she was.

"Madeline?" Malia asked confusedly, before she stepped around a table, spotting the Lightwood on the ground. "Madi!?" She blurted in a panic, before she raised over to her side.

The Bane tried to use magic to heal the Lightwood, but nothing worked as she was already unconscious. Feeling a pulse, Malia let out a sigh of relief.

"Did I... did I do this?" Malia asked herself, before she covered her mouth in shock. "I didn't like Madeline.. but I didn't want to try and kill her." She thought.

The warlock scooped Madi up in her arms, and turned to leave the room but froze in shock as she heard Clary call out, "It's inside her!"

Malia bolted out of the room, still holding Madi as she entered the training room.

"It's still Izzy. Be careful where you aim." Alec declared, before Clary looked up, noticing the girls. "What happened to Madi?" She asked, worried before Alec looked up, at the mention of his other sisters name.

Isabelle, possessed, took this moment to throw Alec on the ground, before she knelt over him. "Always the favorite child. I'm done living in your shadow." She hissed. "Izzy, if you're in there, please listen to me." Alec pleaded, but Isabelle smiled deviously, "Nice try."

Izzy got ready to pull his heart out, but Malia telekinetically threw Isabelle off of Alec. "Isabelle— this isn't you!" The warlock insisted, as the Lightwood girl looked up at Malia, prepared to make some sort of remark in response, but not before Clary jumped and pierced Izzy's shoulder with a dagger.

When Clary pulled the dagger out, the demon left Izzy's body, and she fell to the ground. "Isabelle!" Alec called out, racing to his sister's side. Malia tightened her grip around Madeline, afraid to drop her, "Alec. We need to take them to the infirmary." She spoke.

The demon appeared in front of Clary in the form of smoke. "Go back to Hell where you belong." She snarled, before stabbing the demon. Malia watched in awe for a moment, "What a woman." She blurted, before remembering that two out of four Lightwoods were currently unconscious and needed to be taken care of. Gawking over Clary had to wait.

"Izzy! Izzy, please. Please be okay, Izzy." Alec begged, before Isabelle's eyes fluttered open, "What happened?" She asked. Izzy sat up and Alec held her.

Clary stood up, she and Alec made eye contact. Malia noticed this, and looked confused. Alec went over Izzy's iratze with his stele.

Aldertree and Jace walked into the training room. "What are you doing here?" Aldertree asked Malia. "Madi?" Jace blurted, rushing to Malia's side. "Where's the infirmary?" Malia asked him. "I'll lead the way." Jace answered, hurrying the warlock along. Alec carried Isabelle, following along.