Have to wonder why Tempest is wearing her armor at a painting workshop, but aside from that... this is pretty nice. I like how we're shown this at such an angle that we get a clear profile shot of Tempest but are denied what her painting looks like. Yeah, if you thought the fic that inspired this was too spare in how it described what Tempest was working on, I've got some bad news for you...

Okay, artist, how did you know that I love Tempest depicted as a Cutie Mark Crusader?

As a straightforward scene that reflects the source story, I think this hits the mark. Tempest is visibly frustrated as she attempts to paint something we can't see. Nice work!

A few suggestions for improvement: Take a look at dem leg proportions. The back legs look like they're slightly too long. I'd also add a slight curve between each piece of Tempest's back armor, similar to how you've excellently drawn the neckplate meeting the shoulderplate.

I think Tempest's sketchy outline might be due to a deadline constraint, but I'm not entirely sure. You should smooth out those outlines, or else make it clear why you're thematically leaving the outlines so sketchy.