"Well," Isabelle huffs, crossing her arms. It's hard to stay mad when Billy is trying to be nice to her and her brother is admitting that she's way more fun than him. It's a fact that Isabelle knows well, even if she wishes Alec would join in sometimes.

There's a flash of lightning before Isabelle can think about what to expect, and then suddenly Billy changes. The first thing she does is look him over head to toe appreciatively. It's almost too much, too over the top to be all that attractive, but Isabelle is open to suggestions. "So you yell shazam and turn into a hunk?" She can guess what goes along with the transformation easily enough. He looks like he could step on just about anything and crush it, but she's confident that her whip would give him a run for his money regardless.

"Okay fine," she says to Alec. "He's some kind of super hunk and as well as being the fun sibling, I'm a Shadowhunter." She says the last in Billy's direction, half expecting him to ask what it means and half expecting Alec to have already explained.