Board Thread:False Info and Speculative Discussion/@comment-4772791-20160123002637/@comment-5285305-20160219225220

Shakester71 wrote: Here is my wild and crazy idea of who La Bete is. Theo said he killed his sister because the Dread Doctors told him that she wanted him to have her heart. What if the Dread Doctors got a hold of his sister and put a new heart in her making her a chimera and ultimately the Beast. Hmm..might be a little too far fetched.

My less far fetched theory would be Corey or Mason. In the last episode, we saw La Bete come out from behind a school bus. The last two people near a bus were Mason and Corey. I did mention this one earlier in this thread... Abomiwitz wrote: The idea is that when the Dread Doctors transplanted Theo's sisters heart into him, they transplanted his heart into her, making her a chimera as well. Then revived her with the stuff Theo used to revive the other Chimeras. It is a bit of a stretch, but this is Teen Wolf we're talking about.

But yeah, having the doctors do a heart switcheroo between Theo and his Sister is a bit far fetched. I think ultimately, the solution would be too simple. Her character has no emotional connection to our main characters, and Theo is a sociopath who let her die once already. Both parties wouldn't hesitate in taking her out.