They Fought
To be honest I'm almost sure that Cassiel won't be applying any sort of team work with her brother, she seems to hate me enough to not care about receiving help to beat me, all she wanted to do right now was to poke me full of holes. And just as I suspected, she rushed forwards, her red spear a blazing conflagration of flames that she stabbed towards my head. I took a step back, but she twisted the way the spear moved and brought it down in an impromptu slash.
I was holding a simple shield which I used in blocking her spear, as I stepped back and turned, using the sword in my hand to block Michael's attack as both his swords came slashing for my head. I angled the shield and slammed the edge into his stomach and smashed it upwards towards the left as I hit Cassiel's spear into the air before smashing a kick into her sternum and throwing her backwards, completely off her feet.