Isabelle

“Don't order any of the faerie food," said Jace, looking at her over the top of his menu. "It tends to make humans a little crazy. One minute you're munching a faerie plum, the next minute you're running naked down Madison Avenue with antlers on your head. Not," he added hastily, "that this has ever happened to me.”
― Cassandra Clare, City of Bones

“And now I’m looking at you,” he said, “and you’re asking me if I still want you, as if I could stop loving you. As if I would want to give up the thing that makes me stronger than anything else ever has. I never dared give much of myself to anyone before – bits of myself to the Lightwoods, to Isabelle and Alec, but it took years to do it – but, Clary, since the first time I saw you, I have belonged to you completely. I still do. If you want me.”
― Cassandra Clare, City of Glass

“But-" Maia, still looking at Alec and Magnus, broke off and rasied her eyebrows. Simon turned to see what she was looking at - and stared.
Alec had his arms around Magnus and was kissing him full on the mouth. Magnus, who appeared to be in a state of shock, stood frozen. Several groups of people - Shadowhunters and Downworlders alike - were staring and whispering. Glancing to the side, Simon saw the Lightwoods, their eyes widen, gaping at the display. Maryse had her hand over her mouth.
Maia looked perplexed. "Wait a second," she said. "Do we all have to do that, too?”
― Cassandra Clare, City of Glass

“If you're texting Magnus to say 'I think u r kewl,' I'm going to kill you."
"Who's Magnus?" Max inquired.
"He's a warlock," said Alec.
"A sexy, sexy warlock," Isabelle told Max, ignoring Alec's look of total fury.
"But warlocks are bad," protested Max, looking baffled.
"Exactly," said Isabelle.”
― Cassandra Clare, City of Glass