Her arm is her main(And pretty much only) form of attack. Her saber form relies on her arm.
If this was a Story thread, I'd be going "Darn, you sneaky Jawa."
But, since this is a training thread, Forlorn without her arm = no saber training, :CCry2
lol yeah. She respects his prowess and how he wasn't over confident, but used his skill so that he didn't wear himself down like she did. She's actually going to apply some of his tactics to her own. She'll want to run into him again once the tourney is done, that much is certain.