The deal is that if the effects kick in, he automatically loses.But if he's wearing the Bangles won't she just hurt herself instead of hurting him? But maybe that's what she wants knowing her. He's the type of guy willing to sacrifice himself, but to watch his sister get hurt? I dunno. Any other person he could just stand still and let her kill herself attacking him, but I don't see Lavi letting that happen
We don't have to.PROTEC PHILO SMILE
For the sake of correctness there is a 12 year gap in their ages. Granted if we were to take in their intelligence as part of their ages, Lavi is probably older...I now realize the age gap between Philo and Levi might not be as large as we thought. Is she was around ten when he was 8 or something. Not like he was 4 in the flashback