[@LokiLeo789]
It's a mix of Nuclear and Plasma based power.

[@Rune_Alchemist] 

Thank you for the consideration. In regards to Diana's treachery, well it has to do with being forced to serve Heaven as part of her backstory. Her foundation was never of extreme loyalty to Heaven, and had only remained out of some loyalty to the long dead Saint that forced her into service. Basically the Sisters are the first to show her any compassion, and Bastion is an innocent soul that she wants to safeguard at any cost. 

Is it a bit...sudden, with her defection? Probably. But I think KoL was playing this more in the interest of transitioning her to the Machina all along. 

Though if Gywnn wants to slay the traitor then she can try her hand.