[Elsa has no doubt that Cassandra would be an excellent trainer, after all she's talked about and the skills she's shown so far. It's just her own abilities she has concerns over...]

Is that wise? I know the guards in Arendelle are put through various basic training drills before they move on to any sort of weapon...

[Her tone isn't one of any real protest; she's accepted that this whole training thing is happening, she's just not sure how it's all supposed to go, that's all.]