Aria tried her best, and by that, she meant 'the' best to teach Alena everything she could in a rapid pace.
For a small child like Alena who was coincidentally a puppeteer, Aria thought that it was best for her to focus on defense and agility instead of offense. Her puppets would do the trick for that.
From jumping between Rallaka's crafted platforms without falling, to dodging from Dianthe and Ignis' combined attacks like a heroine from an action movie- Alena did it all. She was placed under one trial after another, leaving her no chance to rest up unless her body really couldn't move an inch anymore.
In that case, Dianthe would come and fix her up in a flash.
The girl was struggling to follow everything, but Aria could see that with each set being repeated, the girl got better and better. Her rate of growth was pleasing to see.