From the time Sasha had moved in with Desmond, she had easily spent half her time in the lab as soon as it was built.
It was because of her race that she didn't dare to roam freely around, which turned out to be unnecessary after learning that there were espers whose abilities gave them unique appearances, something even Desmond was unaware of and they both found out at the end of the battle of the bitter winter when Commander Rundert treated Sasha with the utmost respect and appreciation given her accomplishments during the defensive battle.
Though Desmond was under the impression that the only reason Rundert showed respect rather than greed for Sasha's beauty and power was that even the commander felt fear after seeing the ridiculous destructive power Sasha was capable of wielding.