I remember watching Sasha at the Olympics and fleetingly almost giving up myself. Thank goodness I didn't run into the next room as I wanted to when she stumbled that second time. If I had, I would have missed her magnificent rebound when she picked herself up and just kept going. She made that Olympic performance into one of her most memorable. I can only hope that Mirai develops that capacity.
Yes, it was wonderful that Sasha did not give up! It looks to me though that Mirai has a very different personality. If she lacks mental strength and self-discipline, those things cannot be taught, can they?